It carries food for a flea perhaps (6)
I believe the answer is:
'it carries food' is the definition.
The definition suggests a singular noun which matches the answer.
'a flea perhaps' is the wordplay.
I cannot quite understand how this works, but
'a' could be 'per' (eg 'one a day' means 'one per day') and 'per' is found within the answer.
The remaining letters 'hop' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
'for' acts as a link.
Can you help me to learn more?
(Other definitions for hopper that I've seen before include "What brings grist to the mill?" , "one making short trip?" , "kangaroo?" , "Young locust" , "Edward --, US artist" .)