Gasps (5)
I believe the answer is:
pants
'gasps' is the definition.
('pant' can be a synonym of 'gasp')
This is all the clue.
(Other definitions for pants that I've seen before include "Useless - underwear" , "Breathes heavily in trousers" , "Shocking" , "Knickers" , "Puffs, gasps" .)