Decrepit tractor has no time for crop (6)
I believe the answer is:
carrot
'crop' is the definition.
The answer and definition can be both plants as well as being singular nouns.
Perhaps you can see an association between them that I don't see?
'decrepit tractor has no time' is the wordplay.
'decrepit' is an anagram indicator.
'has no' suggests deleting specific letters.
'time' becomes 't' (abbreviation).
'tractor' with 't' removed is 'ractor'.
'ractor' anagrammed gives 'CARROT'.
'for' acts as a link.
Can you help me to learn more?
(Other definitions for carrot that I've seen before include "Tapering vegetable" , "Pointed vegetable" , "One prov. used to encourage" , "Vegetable - incentive" , "The vegetable to induce" .)