Double cross alien in Wicklow town (6)

I believe the answer is:

betray

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'double cross' is the definition.

'alien in wicklow town' is the wordplay.
'alien' becomes 'et' (extra terrestrial).
'in' is an insertion indicator.
'wicklow town' becomes 'bray' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'et' inserted inside 'bray' is 'BETRAY'.

Can you help me to learn more?

(Other definitions for betray that I've seen before include "Be disloyal to, abuse trust" , "Inadvertently reveal" , "Expose" , "Double-cross, sell out" , "Act treacherously towards (someone)" .)

I've seen this clue in the Irish Times.

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