Crossword Genius

Risk a car crash, when two metals collide? (3,2)

Ross

I believe the answer is:

'risk a car crash' is the definition.
(as in cutting in when overtaking a vehicle)

I don't understand the rest of the clue.

(Other definitions for cut in that I've seen before include "Interpose", "Interrupt a conversation", "Interrupt someone speaking", "interrupt speaker", "Interrupt; veer across another vehicle and take its space".)

I've seen this clue in The Times.