Swallow quickly seen in canyon (5)
I believe the answer is:
gorge
This clue might be a double definition.
'swallow quickly' is the first definition.
'gorge' can be an answer for 'swallow' (thesaurus). I'm not certain of the 'quickly' bit.
'canyon' is the second definition.
(I know that canyon can be written as gorge)
'seen in' is the link.
Can you help me to learn more?
(Other definitions for gorge that I've seen before include "Chasm; overeat" , "Ravine; feast" , "Eat gluttonously" , "chine" , "Overindulge" .)