Tundra man pens play (5)
I believe the answer is:
drama
'play' is the definition.
(synonyms)
'tundra man pens' is the wordplay.
'pens' says the answer is hidden in the clue (pen can mean to contain or cage).
'DRAMA' is hidden within 'tundra man'.
(Other definitions for drama that I've seen before include "theatre performance" , "Literary play" , "Series of events involving conflicting forces" , "Tragic situation" , "Play (as a genre)" .)