Wimp and daughter split (4)
I believe the answer is:
drip
'wimp' is the definition.
(I've seen this before)
'daughter split' is the wordplay.
'daughter' becomes 'd' (genealogical abbreviation).
'split' becomes 'rip' (synonyms).
'd'+'rip'='DRIP'
'and' acts as a link.
(Other definitions for drip that I've seen before include "Trickle -- weakling" , "Hospital equipment; weak person" , "As a tear appears" , "Fall in small blobs" , "Fall in droplets -- weedy person" .)