Crossword Genius

Oddly, Raid insect repellent is something the chippy uses (6)

Ross

I believe the answer is:

ripsaw

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'oddly raid' is the definition.
Although both the answer and definition are singular nouns, I can't see how one could define the other.

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for ripsaw that I've seen before include "It cuts along the grain" , "Coarse wood cutter" , "Cutting tool" .)

I've seen this clue in The Independent.
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