Produce that is left in yard (5)
I believe the answer is:
yield
'produce' is the definition.
(I know that produce is the is a more specific form of the action of yield.)
'that is left in yard' is the wordplay.
'that is' becomes 'ie' (abbreviation for id est, 'that is' in Latin).
'left' becomes 'l' (common abbreviation).
'in' means one lot of letters goes inside another.
'yard' becomes 'yd' (abbreviation).
'ie'+'l'='iel'
'iel' inserted within 'yd' is 'YIELD'.
(Other definitions for yield that I've seen before include "Supply" , "Surrender; output" , "Concede - product" , "profits" , "Cave in" .)