Recommendation of a daughter on immorality? (6)
I believe the answer is:
advice
'recommendation' is the definition.
(thesaurus)
'a daughter on immorality?' is the wordplay.
'a daughter' becomes 'ad' (I've seen this in other clues).
'on' means one lot of letters go next to another.
'immorality?' becomes 'vice' (vice is a kind of immorality).
'ad'+'vice'='ADVICE'
'of' is the link.
(Other definitions for advice that I've seen before include "Opinion given about what to do" , "Counsel given" , "tip" , "Guidance; delivery note" , "Supposed words of wisdom" .)