He’s in telecommunications, all right (5)

I believe the answer is:

roger

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'all right' is the definition.
(thesaurus)

'he's in telecommunications' is the wordplay.
'he' becomes 'rog'.
'in telecommunications' becomes 'er' (I can't justify this - if you can you should give a lot more credence to this answer).
'rog'+'er'='ROGER'

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(Other definitions for roger that I've seen before include "Casement, say" , "One like de Coverley" , "R in telecommunications" , "... guy" , "Man's name" .)

I've seen this clue in the Evening Standard.

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