Dicky wore drab clothes (8)
I believe the answer is:
wardrobe
'clothes' is the definition.
(I've seen this before)
'dicky wore drab' is the wordplay.
'dicky' indicates anagramming the letters (dicky can mean ill or non-functioning).
'wore'+'drab'='woredrab'
'woredrab' anagrammed gives 'WARDROBE'.
(Other definitions for wardrobe that I've seen before include "One's range of clothes" , "(Closet for) clothes" , "storage place" , "Costume department" , "A theatre company's stock of costumes" .)