Had it with being hit really hard? (6)

'had' is the definition.
('bonk' can be a synonym of 'have')

'it with being hit really hard?' is the wordplay.
I cannot really see how this works, but
'it' could be 'e' ('e' can mean 'electronic' which is similar to 'IT') and 'e' is present in the answer.
'hit' could be 'bonk' (bonking is a kind of hitting) and 'bonk' is present in the answer.
A single letter 'd' remains which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?