Sell out seeds finally before spring (4)
I believe the answer is:
shop
'sell out' is the definition.
(I've seen this before)
'seeds finally before spring' is the wordplay.
'finally' says to take the final letters.
'before' is a charade indicator (letters next to each other).
'spring' becomes 'hop' (I've seen this before**).
The final letter of 'seeds' is 's'.
's'+'hop'='SHOP'
(Other definitions for shop that I've seen before include "Betray - place selling things" , "Establishment for the sale of goods" , "Place to buy" , "Store - workplace" , "Give away" .)