Brief topic set out in cable (5,5)

I believe the answer is:

fibre optic

'cable' is the definition.
(fibre optic cable is a kind of cable)

'brief topic set out' is the wordplay.
'set out' indicates anagramming the letters.
'brief'+'topic'='brieftopic'
'brieftopic' anagrammed gives 'FIBRE OPTIC'.

'in' acts as a link.

I've seen this clue in The Guardian.

Want a hint initially instead of a full solution? Install my app