To approach young lady, get a close shave (4,4)
I believe the answer is:
near miss
'a close shave' is the definition.
'to approach young lady' is the wordplay.
'to approach' becomes 'near' ('near' can be a synonym of 'approach').
'young lady' becomes 'miss' ('miss' can be a synonym of 'young lady'**).
'near'+'miss'='NEAR MISS'
'get' acts as a link.
(Other definitions for near miss that I've seen before include "Narrowly avoided collision, not quite on target (4, 4)" , "Close shave" , "Almost hitting the target" , "Close to an accident" , "not a success" .)