Fixed wound, with being inside (8)
I believe the answer is:
standing
'fixed' is the definition.
(thesaurus)
'wound with being inside' is the wordplay.
'wound' becomes 'sting'.
'with' becomes 'and' (I've seen this before).
'being inside' indicates putting letters inside.
'sting' enclosing 'and' is 'STANDING'.
(Other definitions for standing that I've seen before include "Status - on one's feet" , "one sort of committee?" , "Social reputation" , "Buying a round on one's feet" , "Still in" .)