Doctor wore drab clothes (8)
I believe the answer is:
wardrobe
'clothes' is the definition.
(wardrobe is a kind of clothes)
'doctor wore drab' is the wordplay.
'doctor' indicates an anagram.
'wore'+'drab'='woredrab'
'woredrab' anagrammed gives 'WARDROBE'.
(Other definitions for wardrobe that I've seen before include "store here" , "Tall cupboard" , "Complete set of clothes, or their container" , "Tall furniture for storage of clothes" , "Cabinet" .)