The Martian actor returns as The Wanderer (5)

I believe the answer is:

nomad

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'the wanderer' is the definition.
(nomad is a kind of wanderer)

I cannot understand how the rest of the clue works.

(Other definitions for nomad that I've seen before include "Unsettled character" , "Roving person" , "Wanderer" , "Damon (anag.)" , "Member of a wandering pastoral community" .)

I've seen this clue in The Sun.

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