Jumper displayed in foie gras shop, perhaps (11)
I believe the answer is:
grasshopper
'jumper' is the definition.
(I've seen this before)
'gras shop perhaps' is the wordplay.
'shop perhaps' becomes 'shopper' (I am not sure about this - if you are sure you should believe this answer much more).
'gras'+'shopper'='GRASSHOPPER'
'displayed in foie' acts as a link.
This may not be right. Some or all of it may be part of another bit of the clue.
(Other definitions for grasshopper that I've seen before include "small jumper" , "Jumping insect" , "Type of cricket" , "Chirping insect" , "six-footer with extra powerful legs" .)