Biscuit lover, with habit out of control (4,6)
I believe the answer is:
bath oliver
'biscuit' is the definition.
(I've seen this before)
'lover with habit out of control' is the wordplay.
'with' says to put letters next to each other.
'out of control' indicates an anagram.
'lover'+'habit'='loverhabit'
'loverhabit' with letters rearranged gives 'BATH OLIVER'.
(Other definitions for bath oliver that I've seen before include "Plain type of biscuit" , "Hard cheese biscuit - a live throb (anag)" .)