Played part of individual I married going round (12)
I believe the answer is:
impersonated
'played' is the definition.
(impersonating is a kind of playing)
'individual i married going round' is the wordplay.
'individual' becomes 'person' (an individual person).
'married' becomes 'mated' (associated in meaning).
'going round' means one lot of letters goes inside another (some letters go around others).
'i'+'mated'='imated'
'person' put within 'imated' is 'IMPERSONATED'.
'part of' is the link.
(Another definition for impersonated that I've seen is " Pretended to be (someone)".)