Fix where Blythe admits to spying? (7)

The answer is IMPLANT. Explanation: I’M PLANT (the setter of this puzzle admits to spying) a plant is a spy

Independent Puzzle #1675 29 Across 2022-04-03

Explanation

I’M PLANT (the setter of this puzzle admits to spying) a plant is a spy

Source: Fifteensquared

Answer

IMPLANT