Implore centre attendant a bit (7)
I believe the answer is:
entreat
'implore' is the definition.
(thesaurus)
'centre attendant a bit' is the wordplay.
'a bit' says the answer is hidden in the clue (the answer is formed by a bit of the clue).
'ENTREAT' is hidden in the letters of 'centre attendant'.
(Other definitions for entreat that I've seen before include "Beseech, implore" , "Beg earnestly, appeal" , "Pray" , "Ask (someone) earnestly" , "Beg earnestly, plead with" .)