Crop weight reduced during unseasonable warmth (6,5)

I believe the answer is:

winter wheat

I'm a little stuck... Click here to teach me more about this clue!

'crop' is the definition.
Both the answer and definition are singular nouns.
Maybe there's a link between them I don't understand?

'weight reduced during unseasonable warmth' is the wordplay.
'weight reduced' becomes 'w' (short for weight; 'reduced' asks for a short form).
'during' indicates putting letters inside.
'unseasonable' becomes 'winter' (I am not sure about this - if you are sure you should believe this answer much more).
'warmth' becomes 'heat' (synonyms).
'winter'+'heat'='winterheat'
'w' placed into 'winterheat' is 'WINTER WHEAT'.

Can you help me to learn more?

(Another definition for winter wheat that I've seen is " Crop planted in autumn".)

I've seen this clue in The Times.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.