Cockney person who suggests one’s acting? (7)
I believe the answer is:
interim
'acting?' is the definition.
(synonyms)
'cockney person who suggests one's' is the wordplay.
'cockney person who suggests' becomes ''inter' ('hinter' - someone providing hints - said with the 'H' dropped - a cockney accent.).
'one's' becomes 'I'm' ('one is' is a formal way of saying 'I am').
'inter'+'im'='INTERIM'
(Other definitions for interim that I've seen before include "Stopgap" , "acting" , "An intervening period of time" , "Meantime; temporary" , "Caretaker" .)