7 down
Chestnut
one
replaced
with
ring
for
crop
protection
(6)
Chestnut one replaced with ring for crop protection (6)
hints
0
checks
0
hints
The definition is at the end of the clue.
How the clue works
Right, so crop protection at the end is the definition — a cloche's that cover you put over plants. Now, "chestnut" here means a hoary old CLICHE, and you just swap the "one" (the letter I) for a "ring" (the letter O), turning CLICHE into CLOCHE.