Kind acts somehow filling familiar role (8)
I believe the answer is:
typecast
'filling familiar role' is the definition.
(as in actor being typecast)
'kind acts somehow' is the wordplay.
'kind' becomes 'type' (type is a kind of kind).
'somehow' indicates anagramming the letters.
'acts' with letters rearranged gives 'cast'.
'type'+'cast'='TYPECAST'
(Other definitions for typecast that I've seen before include "Always given the same sort of roles" , "make actor repeat himself ..." , "Assigned the same kind of role repeatedly" , "playing similar roles" , "fitting a standard image" .)