Crossword Genius

Key man who introduced antiseptics for a burn (7)

Ross

I think it could be either:

Which length description are you looking for?:

3

7

blister

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'a burn' is the definition.
(thesaurus)

'key man who introduced antiseptics' is the wordplay.
I cannot quite understand how this works, but
'key' could be 'e' (musical key) and 'e' is found within the answer.
'man' could be 'r' (abbreviation for rook, a chess piece or 'man') and 'r' is found in the answer.
The remaining letters 'blist' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).

'for' is the link.

Can you help me to learn more?

(Other definitions for blister that I've seen before include "Result of friction" , "Friction mark" , "Bubble on the skin filled with fluid" , "Give hair dryer treatment" , "Sore bubble on skin" .)

I've seen this clue in the Evening Standard.
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