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' (similar in meaning).
'up?' says the letters should be written in reverse (I've seen 'up' mean this (in down clue: letters go upwards)).
'yes' becomes 'aye' ('aye' means 'yes').
'getting' means one lot of letters go next to another.
'day' becomes 'd' (abbreviation for day).
'led' back-to-front 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" .)