Cameron's new love affair (7)
I believe the answer is:
romance
'love affair' is the definition.
(I know that love affair can be written as romance)
'cameron's new' is the wordplay.
'new' is an anagram indicator.
'cameron' is an anagram of 'ROMANCE'.
(Other definitions for romance that I've seen before include "Language group; love affair" , "Love-story" , "Amorous relationship" , "Affair of the heart" , "Court" .)