Put clock up (4)
I believe the answer is:
laid
'put' is the definition.
(I've seen this before)
'clock up' is the wordplay.
'clock' becomes 'dial' (I've seen this before).
'up' shows that the letters should be reversed in order (in down clue: letters go upwards).
'dial' written backwards gives 'LAID'.
(Other definitions for laid that I've seen before include "tables may be?" , "Produced eggs" , "Wagered" , "The clutch must be" , "(Of dining table) set" .)