Daughter maybe finding insect under sink (10)
I believe the answer is:
descendant
'daughter maybe' is the definition.
(I know that daughter is a type of offspring)
'insect under sink' is the wordplay.
'insect' becomes 'ant' (ant is a kind of insect).
'under' says to put letters next to each other (below, in a down clue).
'sink' becomes 'descend' (I've seen this before).
'ant' put after 'descend' is 'DESCENDANT'.
'finding' is the link.
(Other definitions for descendant that I've seen before include "One from a long line" , "Grandson maybe" , "Later family member" , "Future person in one's family line" , "Progeny" .)