Group of sailors carrying on bachelor chat with Lucy (5,4)
I believe the answer is:
yacht club
'group of sailors' is the definition.
(I've seen this before)
'carrying on bachelor chat with lucy' is the wordplay.
'carrying on' is an anagram indicator (carry on can mean to mess around).
'bachelor' becomes 'B' (abbreviation e.g. BA=Bachelor of Arts).
'with' means one lot of letters go next to another.
'b'+'chat'='bchat'
'bchat' put after 'lucy' is 'lucybchat'.
'lucybchat' anagrammed gives 'YACHT-CLUB'.
(Other definitions for yacht club that I've seen before include "Sailing association" , "where seamen gather" , "Group of sailors" , "Seafaring group" , "Genteel boating society" .)