Wield spade in indignation (3)

I believe the answer is:

dig

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'wield spade' is the definition.
I can't judge whether this definition defines the answer.

'in indignation' is the wordplay.
'in' indicates the answer is hidden within the clue.
'DIG' is hidden in the letters of 'indignation'.

Can you help me to learn more?

(Other definitions for dig that I've seen before include "Burrow" , "Site of an archeological exploration" , "Appreciate - archaeological research" , "Loosen or turn up earth" , "Delve" .)

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

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