Last of crops I see in storage tower (4)
I believe the answer is:
silo
'storage tower' is the definition.
(tower for storing grain on a farm)
'last of crops i see' is the wordplay.
'last of' suggests the final letters.
'see' becomes 'lo' ('lo' is an archaic exclamation meaning 'look!').
The final letter of 'crops' is 's'.
's'+'i'+'lo'='SILO'
'in' acts as a link.
(Other definitions for silo that I've seen before include "Grain storage tower" , "Storage tower for oils" , "Missile pit" , "Storage pit, tower" , "Large container for oils" .)