Contemptibly small (6)
I believe the answer is:
measly
'contemptibly small' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for measly that I've seen before include "Poor" , "Mean, ungenerous" , "'Contemptibly small, paltry (6)'" , "not at all generous" , "Miserably paltry" .)