Hunter gets alternative charged particle (5)
I believe the answer is:
orion
'hunter' is the definition.
(constellation)
'alternative charged particle' is the wordplay.
'alternative' becomes 'or'.
'charged particle' becomes 'ion' (I've seen this in another clue).
'or'+'ion'='ORION'
'gets' is the link.
(Other definitions for orion that I've seen before include "Constellation with seven bright stars" , "Rigel constellation" , "Great hunter of Greek legend and a constellation" , "Hunter slain by Artemis" , "Mythical great hunter" .)