Lovers rapidly confused cabinet minister (4,5,4)
I believe the answer is:
lord privy seal
'cabinet minister' is the definition.
(Lord Privy Seal is an example)
'lovers rapidly confused' is the wordplay.
'confused' indicates an anagram.
'lovers'+'rapidly'='loversrapidly'
'loversrapidly' is an anagram of 'LORD PRIVY SEAL'.
(Other definitions for lord privy seal that I've seen before include "Senior cabinet minister" , "minister's office" , "Cabinet member" , "Top cabinet minister" , "UK cabinet minister without specific departmental duties" .)