Love between filthy rich singers (5)
I believe the answer is:
choir
'singers' is the definition.
(group of singers)
'love between filthy rich' is the wordplay.
'love' becomes 'o' (love means zero in tennis).
'between' means one lot of letters goes inside another.
'filthy' is an anagram indicator (messy letters).
'rich' is an anagram of 'chir'.
'o' put within 'chir' is 'CHOIR'.
(Other definitions for choir that I've seen before include "Group of singers, often in church" , "Singers in harmony" , "Large group of singers" , "People in church" , "set of singers" .)