Duck! Rampaging Patel blowing top! (4)
I believe the answer is:
teal
'duck' is the definition.
(teal is a kind of duck)
'rampaging patel blowing top' is the wordplay.
'rampaging' indicates anagramming the letters (I've seen this in other clues).
'blowing top' means to remove the first letter.
'patel' with its first letter taken away is 'atel'.
'atel' anagrammed gives 'TEAL'.
(Other definitions for teal that I've seen before include "Small river duck" , "Small freshwater duck and colour" , "Dark greenish-blue colour" , "Strange tale of a duck" , "Small, short-necked duck" .)