Uncovers men boxing men, striking head (7)

'uncovers' is the definition.
Although both the answer and definition are verbs in their -s form, I cannot see how they can define each other.

'men boxing men striking head' is the wordplay.
'men' becomes 'dudes' (dude is a kind of man).
'boxing' means one lot of letters goes inside another ('box' can mean contain, as in to put in a box).
'striking head' means to remove the first letter (strike out or remove the first letter).
'men' with its initial letter taken off is 'en'.
'dudes' enclosing 'en' is 'DENUDES'.

Can you help me to learn more?