To tear around in a whirl? (6)
I believe the answer is:
rotate
'a whirl?' is the definition.
(I know that whirl is a kind of rotate)
'to tear around' is the wordplay.
'around' indicates anagramming the letters.
'to'+'tear'='totear'
'totear' is an anagram of 'ROTATE'.
'in' acts as a link.
(Other definitions for rotate that I've seen before include "Go around" , "Turn round" , "Turn around on axis or central point" , "wheel" , "Go round and round" .)