Standard staff supply of legal paraphernalia at induction (8)

I believe the answer is:

flagpole

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'supply of legal paraphernalia at induction' is the definition.
I can't judge whether this defines the answer.

'standard staff' is the wordplay.
'standard' becomes 'flag' (I've seen this before).
'staff' becomes 'pole' (I've seen this before).
'flag'+'pole'='FLAGPOLE'

Can you help me to learn more?

(Other definitions for flagpole that I've seen before include "Mast on which banner is hoist" , "Ceremonial mast" , "Support for banner." , "Standard post" , "On which standard flies" .)

I've seen this clue in The Telegraph.

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