Not all stunts will amaze you! (4)
I believe the answer is:
stun
'amaze you' is the definition.
'stun' can be an answer for 'amaze' (to stun is to amaze or shock). I'm not certain of the 'you' bit.
'not all stunts' is the wordplay.
I cannot quite understand how this works, but
'not' could be 'un' (prefix meaning 'not') and 'un' is found in the answer.
The remaining letters 'st' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
'will' is the link.
Can you help me to learn more?
(Other definitions for stun that I've seen before include "Leave speechless" , "Daze, paralyse" , "Confuse" , "Nuts (anag)" , "Knock unconscious" .)