Blend of cigarette tar -- get nicotine-free for rolling (9)

I believe the answer is:

integrate

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

'blend' is the definition.
(I've seen this in another clue)

'cigarette tar get nicotine-free for rolling' is the wordplay.
'INTEGRATE' is hidden backwards within the letters.
However, I am unsure how the hidden word is indicated.

'of' is the link.

Can you help me to learn more?

(Other definitions for integrate that I've seen before include "Combine into a whole, unite" , "Mix" , "Organise a get-together" , "Join" , "Get together" .)

I've seen this clue in The Telegraph.

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