Guided up? Yes, getting day behind schedule (7)
I believe the answer is:
delayed
'behind schedule' is the definition.
(I've seen this in another clue)
'guided up? yes getting day' is the wordplay.
'guided' becomes 'led' ('lead' can be a synonym of 'guide').
'up?' says the letters should be written in reverse (in down clue: letters go upwards).
'yes' becomes 'aye' ('aye' means 'yes').
'getting' is a charade indicator (letters next to each other).
'day' becomes 'd' (abbreviation for day).
'led' in reverse letter order is 'del'.
'del'+'aye'+'d'='DELAYED'
(Other definitions for delayed that I've seen before include "Deferred, postponed" , "Protracted" , "Detained, help up" , "Put back" , "Caused to be held up" .)