Range of adult recordings (4)
I believe the answer is:
alps
'range' is the definition.
(mountain range)
'adult recordings' is the wordplay.
'adult' becomes 'a' (abbreviation).
'recordings' becomes 'LPs' (LP is an example).
'a'+'lps'='ALPS'
'of' is the link.
(Other definitions for alps that I've seen before include "European mountain chain" , "Mont Blanc mountains" , "European mountain range" , "high points" , "Mountain system, highest peak Mont Blanc" .)