Ripping bits of granite (7)
I believe the answer is:
tearing
'ripping bits' is the definition.
'tearing' can be an answer for 'ripping' (I've seen this in another clue). I'm unsure of the 'bits' bit.
'of granite' is the wordplay.
'of' indicates an anagram (the answer comes from or 'of' the letters).
'granite' is an anagram of 'TEARING'.
Can you help me to learn more?
(Other definitions for tearing that I've seen before include "splitting" , "violent" , "Granite (anag.)" , "'Pulling apart, ripping (7)'" .)