Salmon displaying communist angle! (7)

I believe the answer is:

redfish

'salmon' is the definition.
(redfish is a kind of salmon)

'communist angle' is the wordplay.
'communist' becomes 'red' (red is a kind of communist).
'angle' becomes 'fish' ('fish' can be a synonym of 'angle').
'red'+'fish'='REDFISH'

'displaying' acts as a link.

I've seen this clue in The Telegraph.

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