Poor player accepting role reversal . . . it's a snare (6,4)

'a snare' is the definition.
I know nothing about this answer so I cannot tell whether it can be defined by this definition.

'poor player accepting role reversal' is the wordplay.
'poor player' becomes 'rabbit' (I've seen this before).
'accepting role' becomes 'part' (I can't explain this - if you can you should give a lot more credence to this answer).
'reversal' says the letters should be written backwards.
'part' reversed gives 'trap'.
'rabbit'+'trap'='RABBIT TRAP'

'it's' is the link.

Can you help me to learn more?