Key man who introduced antiseptics for a burn (7)

I believe the answer is:

blister

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'for a burn' is the definition.
(thesaurus)

I don't understand the rest of the clue.

(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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