The most common and most likely answer to this crossword clue is the 5 plus 5 letter word START NAKED
I've seen this crossword clue in The Times
S
T
A
R
T
N
A
K
E
D
Buddy explains!
The straight part
We know that "not covered in some places" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case not covered in some places = start naked.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.