Reacting badly on almost being choked by fresh garlic (8)
I believe the answer is:
allergic
'reacting badly' is the definition.
(I've seen this before)
'on almost being choked by fresh garlic' is the wordplay.
'on' becomes 'leg' (cricket term, fielding positions).
'almost' means to remove the last letter (almost the whole word is kept).
'being choked by' means one lot of letters goes inside another (I've seen this in other clues).
'fresh' indicates an anagram (a fresh re-ordering of the letters).
'leg' with its last letter removed is 'le'.
'garlic' is an anagram of 'alrgic'.
'le' put inside 'alrgic' is 'ALLERGIC'.
(Other definitions for allergic that I've seen before include "Hypersensitive (to certain substances)" , "Medically sensitive to" , "Reacting (to certain substances)" , "Having unfavourable reaction to foods or plants" , "Reacting badly to certain things" .)