Lacking wit or imagination (7)
I believe the answer is:
prosaic
'lacking wit or imagination' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for prosaic that I've seen before include "So Capri! (anag)" , "routine" , "Dull (writing)" , "Non-poetic, unromantic" , "Mundane" .)