Crossword Genius

Go into some alien territories (5)

Ross

I believe the answer is:

enter

'go into' is the definition.
(enter can mean to go into a place)

'some alien territories' is the wordplay.
'some' indicates a hidden word (some of the parts of the word are used).
'ENTER' can be found hidden inside 'alien territories'.

(Other definitions for enter that I've seen before include "Take part in a contest" , "Come/go in" , "Come or go in" , "Go/come in" , "Register formally as a participant" .)

I've seen this clue in The Sun.
Want a hint initially instead of a full solution? Install my app