Direct path (7)
I believe the answer is:
'direct path' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for beeline that I've seen before include "Make ........ for - go straight towards like honey collector" , "To make a -- for is to go without deviation" , "Straight route" , "Straightest route" , "Direct track" .)