Fight to get resort right (4)
I believe the answer is:
spar
'fight' is the definition.
(I know that spar is a more specific form of the action box)
'get resort right' is the wordplay.
'get' is a charade indicator (letters next to each other).
'resort' becomes 'spa' (spa is a kind of resort).
'right' becomes 'r' (common abbreviation).
'spa' put next to 'r' is 'SPAR'.
'to' is the link.
(Other definitions for spar that I've seen before include "Crystal - box" , "Stout pole to support rigging" , "A mineral; nautical pole" , "Pole-shaped part of the rigging" , "Pole to support sails, rigging etc" .)