The most common and most likely answer to this crossword clue is the 8 letter word BACKCOMB
I've seen this crossword clue in The Times
B
A
C
K
C
O
M
B
Buddy explains!
The straight part
We know that "puff out hair" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case puff out hair = backcomb.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 BACKCOMB mean?
BACKCOMB noun- The hairstyle produced by backcombing.
- A decorative comb worn as an ornament and to secure a hairstyle.
- To hold hair and comb it towards the head, thus giving it a bushier look; tease.