Crossword Genius

A beat I incorporated into another from 'South Pacific'? (8)

Ross

I believe the answer is:

tahitian

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

'incorporated into another from 'south pacific'?' is the definition.
I can't tell whether this defines the answer.

'a beat i' is the wordplay.
I cannot quite see how this works, but
'a' could be 'an' and 'an' is found within the answer.
'beat' could be 'hit' (I've seen this before) and 'hit' is located in the answer.
'i' could be 'a' and 'a' is located in the answer.
The remaining letters 'ti' is a valid word which might be clued in a way I don't see.
This may be the basis of clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for tahitian that I've seen before include "From French Polynesia" , "South Sea islander" , "inhabitant of island" , "It, in a hat (anag)" , "Pacific islander" .)

I've seen this clue in The Independent.
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