19 across
Go
over
something
obvious
left
(5)
Go over something obvious left (5)
hints
0
checks
0
hints
The whole clue is the definition (& lit or double definition).
How the clue works
The first definition is Go over, meaning to cross (e.g. a road). The second definition is something obvious left, referring to a cross — the mark left by someone signing with an X.