Oppose because is amongst the others (6)

I believe the answer is:

resist

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'oppose' is the definition.
(resisting is a kind of opposing)

'is amongst the others' is the wordplay.
'amongst' is an insertion indicator (I've seen this in other clues).
'the others' becomes 'rest' (I've seen this before).
'is' inserted inside 'rest' is 'RESIST'.

'because' acts as a link.
This may not be correct. It may belong to another bit of the clue.

Can you help me to learn more?

(Other definitions for resist that I've seen before include "Use force to prevent something from happening to sister" , "Oppose or fight against someone" , "'Withstand, fight against (6)'" , "Hold out for sister" , "Bar" .)

I've seen this clue in The Irish News.

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