Trinidadian pop? (3)

I believe the answer is:

dad

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'pop?' is the definition.
('dad' can be a synonym of 'pop')

'trinidadian' is the wordplay.
'DAD' is hidden within the letters.
However, I'm unsure how the hidden word is indicated.

Can you help me to learn more?

(Other definitions for dad that I've seen before include "Pa" , "Mum's mate" , "Old man" , "Pop, pater" , "Papa" .)

I've seen this clue in the Evening Standard.

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