Saying someone had struck you when he hadn't? (8,3)

'he hadn't?' is the definition.
I don't know anything about this answer so I can't tell whether this works.

'saying someone had struck you when' is the wordplay.
I cannot really see how this works, but
'someone' could be 'pi' (PI is an example) and 'pi' is present in the answer.
'you' could be 'u' (commonly used in online communication) and 'u' is found in the answer.
'when' could be 'e' (I've seen this in other clues) and 'e' is found within the answer.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?