Syrupy stuff daughter finds agreeable (4)
I believe the answer is:
good
'agreeable' is the definition.
(thesaurus)
'syrupy stuff daughter' is the wordplay.
'syrupy stuff' becomes 'goo' (syrupy substance).
'daughter' becomes 'd' (genealogical abbreviation).
'goo'+'d'='GOOD'
'finds' is the link.
(Other definitions for good that I've seen before include "and 22 Down and 14 Across: Christmas carol" , "Enjoyable -- moral" , "promoting welfare" , "(Of child) well-behaved" , "Moral excellence" .)