Stingy lass's narrowly avoided collision (4,4)
I believe the answer is:
near miss
'narrowly avoided collision' is the definition.
(near miss can mean a narrowly avoided crash)
'stingy lass's' is the wordplay.
'stingy' becomes 'near' (I've seen this in another clue).
'lass' becomes 'miss' (I've seen this before).
'near'+'miss'='NEAR MISS'
(Other definitions for near miss that I've seen before include "Failure just" , "narrowly averted disaster" , "Just off the target (4,4)" , "Narrowly-averted accident" , "Not quite on target, but close" .)