Come in from barren terrain (5)

I believe the answer is:

enter

'come in' is the definition.
(synonyms)

'from barren terrain' is the wordplay.
'from' indicates the answer is hidden within the clue.
'ENTER' is hidden within 'barren terrain'.

(Other definitions for enter that I've seen before include "Infiltrate" , "Gain admission" , "Come/go in" , "Record (in a log)" , "Pierce" .)

I've seen this clue in The Daily Express and The Mirror.

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