The most common and most likely answer to this crossword clue is the 5 plus 3 letter word CATCH ONE
C
A
T
C
H
O
N
E
Buddy explains!
The straight part
We know that "rest to gain inspiration?" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case rest to gain inspiration? = catch one.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.