One who may file patent leather shoe at last takes on first concession around (10)

I believe the answer is:

registrant

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'one who may file patent leather shoe at last' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.

'on first concession around' is the wordplay.
'on' becomes 're' (regarding).
'first' becomes 'ist' (ist resembles gst).
'concession' becomes 'grant' (synonyms).
'around' indicates putting letters inside.
'ist' inserted within 'grant' is 'gistrant'.
're'+'gistrant'='REGISTRANT'

'takes' is the link.

Can you help me to learn more?

I've seen this clue in The Guardian.

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