Cats perhaps claim us mischievously (7)
I believe the answer is:
musical
'cats perhaps' is the definition.
(I've seen this before)
'claim us mischievously' is the wordplay.
'mischievously' indicates anagramming the letters (I've seen this in other clues).
'claim'+'us'='claimus'
'claimus' is an anagram of 'MUSICAL'.
(Other definitions for musical that I've seen before include "Cats maybe" , "Type of stage show" , "Tuneful; stage work" , "Annie or Mame, say" , "Stage show; harmonious" .)