Vegetable last seen in larder — a beauty! (6)
I believe the answer is:
radish
'vegetable' is the definition.
(radish is a type of vegetable)
'last seen in larder a beauty' is the wordplay.
'last seen in' suggests the final letters.
'beauty' becomes 'dish' (slang term for an attractive person).
The final letter of 'larder' is 'r'.
'r'+'a'+'dish'='RADISH'
(Other definitions for radish that I've seen before include "Hottish salad plant" , "Daikon or mooli" , "Sir had this vegetable" , "Bit of salad" , "Pungent fleshy edible root eaten in salads" .)