Crossing beneficial to Dutch (4)
I believe the answer is:
ford
'crossing' is the definition.
(ford is a kind of crossing)
'beneficial to dutch' is the wordplay.
'beneficial to' becomes 'for' (I've seen this in another clue).
'dutch' becomes 'd' (common abbreviation).
'for'+'d'='FORD'
(Other definitions for ford that I've seen before include "Shallow river-crossing" , "38th US president, Gerald" , "Shallow area in a stream where it can be crossed" , "White paint for the face" , "Car - river crossing" .)