Crossword Genius

Delay support for robbery (6)

Ross

I believe the answer is:

holdup

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'for robbery' is the definition.
(holdup is a kind of robbery)

'delay support' is the wordplay.
'delay' becomes 'hold' (synonyms).
'support' becomes 'up' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'hold'+'up'='HOLDUP'

Can you help me to learn more?

I've seen this clue in The Irish Times.
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