Cleavage, extremely large, seen in China? (7)
I believe the answer is:
crackle
'china?' is the definition.
(crackle china is a kind of china)
'cleavage extremely large' is the wordplay.
'cleavage' becomes 'crack' (I am not sure about this - if you are sure you should believe this answer much more).
'extremely' suggests removing the centre (only the extremes of the word are used).
'large' with its middle removed is 'le'.
'crack'+'le'='CRACKLE'
'seen in' is the link.
Can you help me to learn more?
(Other definitions for crackle that I've seen before include "Sound of burning wood or squeezed paper" , "Sound as of dry twigs burning" , "Snapping sound of a bonfire?" , "Noise of interference" , "Sound as of burning sticks" .)