Crossword Genius

Advertise local large disco -- it's hep occasionally! (9)

Ross

I believe the answer is:

publicise

'advertise' is the definition.
(I know that advertise can be written as publicise)

'local large disco it's hep occasionally' is the wordplay.
'local' becomes 'pub' (one's local pub).
'large' becomes 'L' (eg in clothes sizes).
'occasionally' indicates alternate letters (letters taken at regular intervals or occasions).
'disco'+'its'+'hep'='discoitshep'
The alternating letters of 'discoitshep' are 'icise'.
'pub'+'l'+'icise'='PUBLICISE'

I've seen this clue in The Telegraph.
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