The most common and most likely answer to this crossword clue is the 8 letter word THERMALS
I've seen this crossword clue in The Daily Telegraph
T
H
E
R
M
A
L
S
More clues leading to the result THERMALS
- Half of them bang on about warm clothes
- Rex wears Hamlet’s specially designed clothing
- Items of underwear? They can provide uplift
- More than one current article right to criticise after a U-turn
- Winds coming up? Get some warm clothes
- Unmentionables that could really put the wind up!
- Warm clothes for rising hot air currents?
- Underwear hamster chewed up, including first of lingerie
- Underwear as present — for the most part found by a student in M&S
- Items of underwear — are those currently uplifting?
Buddy explains!
The straight part
We know that "Unmentionables" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case unmentionables = thermals.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does THERMALS mean?
THERMALS noun- A column of rising air in the lower atmosphere created by uneven heating of Earth's surface.