Put down, face up (4)
I believe the answer is:
laid
'put down' is the definition.
(to lay something is to put it down somewhere)
'face up' is the wordplay.
'face' becomes 'dial' (face of a clock).
'up' is a reversal indicator (in down clue: letters go upwards).
'dial' backwards is 'LAID'.
(Other definitions for laid that I've seen before include "Wagered" , "Placed horizontally on a surface" , "The clutch must be" , "settled" , "Deposited" .)