Pull on cyan kaftan, discreetly (4)

I believe the answer is:

yank

I'm a little stuck... Click here to teach me more about this clue!

'pull' is the definition.
(I know that yank is a more specific form of pull)

'cyan kaftan discreetly' is the wordplay.
'YANK' is hidden in amongst the letters.
However, I'm unsure how this is indicated.

'on' acts as a link.

Can you help me to learn more?

(Other definitions for yank that I've seen before include "American from the North" , "Sudden hard pull" , "Pull sharply" , "Tug suddenly" , "Tug shaply" .)

I've seen this clue in The Irish Times.

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