Small daughter sent back uncooked seafood (8)
I believe the answer is:
dwarfish
'small' is the definition.
('dwarfish' can be similar in meaning to 'small')
'daughter sent back uncooked seafood' is the wordplay.
'daughter' becomes 'd'.
'sent back' is a reversal indicator.
'uncooked' becomes 'raw' ('raw' can be similar in meaning to 'uncooked').
'seafood' becomes 'fish' (fish is a kind of seafood**).
'raw' written backwards gives 'war'.
'd'+'war'+'fish'='DWARFISH'
(Other definitions for dwarfish that I've seen before include "Despicable" , "on the small side" , "Unusually small (in stature)" .)