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Try to do it. Going up, O! Ah! Clumsily gave in (4,1,2)

Ross

I believe the answer is:

have a go

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

'try' is the definition.
(to have a go is to make an attempt)

'up o ah clumsily gave in' is the wordplay.
'up' shows that the letters should be reversed in order (in down clue: letters go upwards).
'clumsily' is an anagram indicator.
'in' is an insertion indicator.
'o'+'ah'='oah'
'oah' reversed gives 'hao'.
'gave' anagrammed gives 'veag'.
'hao' placed around 'veag' is 'HAVE-A-GO'.

'to do it going' acts as a link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.

Can you help me to learn more?

(Other definitions for have a go that I've seen before include "Intervening to stop a criminal (colloq,)" , "Tackle criminal" , "Words of encouragement" , "Try (to help stop criminal?)" , "try to foil criminal" .)

I've seen this clue in the Sydney Morning Herald.
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