Gallant in a hurry (7)
I believe the answer is:
dashing
'gallant' is the definition.
(I know that gallant can be written as dashing)
'hurry' is the wordplay.
I cannot really see how this works, but
'hurry' could be 'dash' (dash is a kind of hurry) and 'dash' is present in the answer.
This explanation may well be incorrect...
'in a' is the link.
Can you help me to learn more?
(Other definitions for dashing that I've seen before include "sprinter's talent?" , "Stylish, adventurous" , "as blade might be" , "Frustrating; debonair" , "Swashbuckling" .)