The most common and most likely answer to this crossword clue is the 6 letter word KHARIF
K
H
A
R
I
F
Buddy explains!

The straight part
We know that "cropping season" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case cropping season = kharif.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
Crossword Answer definitions
KHARIF adjective- Of crops: cultivated and harvested during the monsoon season.