Snow White's associate chief is an inattentive person (10)
I believe the answer is:
sleepyhead
'an inattentive person' is the definition.
(I've seen this before)
'snow white's associate chief' is the wordplay.
I cannot really understand how this works, but
'chief' could be 'head' (synonyms) and 'head' is found within the answer.
The remaining letters 'sleepy' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
'is' acts as a link.
Can you help me to learn more?
(Other definitions for sleepyhead that I've seen before include "One may lie in" , "Dozy type" , "One dropping off" , "Tired/inattentive person" , "dormouse?" .)