Skip off to the altar (5)
I believe the answer is:
elope
'skip off to the altar' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for elope that I've seen before include "Do a runner" , "Bolt" , "go off to the match?" , "Run away with lover" , "Run off with Mr/Ms Right" .)