The addition of this item makes a man's suit a 3-piece suit
waistcoat (vest)
A thespian on standby
(10 letters)
understudy
This "blazing" insect originally from South America may live in colonies of 100,000 & can inflict a painful sting
fire ants
Reaching the mark in 2024, he was the first president to live to be 100
Jimmy Carter
Mars was the Roman equivalent of this Greek god
Ares
A jacket of this woolen fabric with elbow patches is part of the classic professorial look
tweed
It keeps the hair off your neck
(4 letters)
an updo
North America's longest venomous snake is the Eastern variety of this rattlesnake that lends its name to a pro sports team
diamondback
James Madison was the first president to ask Congress for a declaration of war, for this conflict
War of 1812
This magic man in "The Tempest" is the exiled Duke of Milan
Prospero
There's confusion as to whether the now-iconic yellow plaid suit the character Cher wore in this film was by D&G or Jean Paul Gaultier
Clueless
Authority figure who cries foul
(6 letters)
an umpire
With its bite, the cute but deadly slow loris is the only known venomous member of this group of higher mammals
primates
Calvin Coolidge was the first & so far only president born on this date; 3 have died on it
July 4th
Pre-telegraph, you could communicate over long distances via this, a name derived from French, using flags or lights
semaphore
The name of this striped fabric popular for summer suits comes from Persian for "milk & sugar"
seersucker
Final offer or demand
(9 letters)
an ultimatum
In Japan the potentially poisonous pufferfish is known by this 4-letter name & when eaten, must be specially prepared
fugu
For helping end the Russo-Japanese War, he was the first president & the first American to win the Nobel Peace Prize
Teddy Roosevelt
Before mastering the art of French cooking, Julia Child worked for this precursor to the CIA during World War II
the OSS
If you want a bespoke suit, this London street is synonymous with custom tailoring; Henry Poole & Co. is a good choice there
Savile Row
All over the place
(10 letters)
ubiquitous
Hornet venom contains histamines that can cause the severe allergic reaction called type 1 this
anaphylaxis
He was the first president who had never been elected president or vice president
Gerald Ford
This Muse might be amused to find her name on many a circus musical instrument
Calliope