Gasped (6)
I believe the answer is:
panted
'gasped' is the definition.
('pant' can be a synonym of 'gasp')
This is the entire clue.
(Other definitions for panted that I've seen before include "Breathed heavily as after exercise" , "Breathed noisily" , "Breathed heavily after exertion" , "Gasped, puffed" .)