Cryptic crossword clue
Once you start to yawn, ebbing body temperature contains it 7

The most common and most likely answer to this crossword clue is the 7 letter word THYSELF

T
H
Y
S
E
L
F


Buddy explains!

The straight part
We know that "Once you" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case once you = thyself.
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 THYSELF mean?

THYSELF pronoun
  1. Yourself (as the object of a verb or preposition or as an intensifier); reflexive case of thou

Latest crossword clues with full explanations