Not a pleasing, deviating type of bowling (3,4)
I believe the answer is:
leg spin
'type of bowling' is the definition.
(I've seen this before)
'not a pleasing deviating' is the wordplay.
'not' suggests deleting specific letters.
'deviating' indicates an anagram.
'pleasing' with 'a' removed is 'plesing'.
'plesing' is an anagram of 'LEG-SPIN'.
(Other definitions for leg spin that I've seen before include "Type of bowling" , "Bowling technique" , "Delivery method" , "What perhaps turns off" , "Style of bowling" .)