Appeal from centre attacker (7)
'appeal' is the definition.
'from centre attacker' is the wordplay.
'from' indicates a hidden word.
'ENTREAT' is hidden within 'centre attacker'.
(Other definitions for entreat that I've seen before include "Ask (someone) earnestly", "Beseech, implore", "Ask (someone) anxiously", "Beg earnestly, plead with", "go begging?".)