Sly creature in pop song? (6)
I believe the answer is:
weasel
'sly creature' is the definition.
'weasel' can be an answer for 'creature' (I've seen this before). I am not certain of the 'sly' bit.
I can't explain the remainder of the clue.
(Other definitions for weasel that I've seen before include "Cowardly carnivore" , "Sneaky person - small, long-necked carnivorous animal" , "Carnivore (with evasive words)" , "Musteline animal" , "Predator" .)