Overcome with relief, long-awaited (6)

I believe the answer is:

subdue

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'overcome' is the definition.
(subduing is a kind of overcoming)

'with relief long-awaited' is the wordplay.
'with' is a charade indicator (letters next to each other).
'relief' becomes 'sub' (I've seen this in another clue).
'long awaited' becomes 'due' (I've seen this in another clue. I am not sure about the 'long' bit.).
'sub'+'due' is 'SUBDUE'.

Can you help me to learn more?

(Other definitions for subdue that I've seen before include "Force to yield, tame" , "Moderate" , "Bring under control, tame" , "Quell" , "Quash" .)

I've seen this clue in The Irish Times.

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