Frail feline seen in food shop, European (8)
I believe the answer is:
delicate
'frail' is the definition.
(I know that frail can be written as delicate)
'feline seen in food shop european' is the wordplay.
'feline' becomes 'cat' (cat is a kind of feline).
'seen in' indicates putting letters inside.
'food shop' becomes 'deli' (short for delicatessen).
'european' becomes 'e' (abbreviation e.g. EU).
'deli'+'e'='delie'
'cat' placed inside 'delie' is 'DELICATE'.
(Other definitions for delicate that I've seen before include "Dainty - fragile" , "Very finely textured" , "Exquisitely fine, easily damaged" , "Exquisitely fine and subtle" , "Exquistley fine or easily damaged" .)