Telephone put back (4)
I believe the answer is:
dial
'telephone' is the definition.
(dial telephone is a kind of telephone)
'put back' is the wordplay.
'put' becomes 'laid' (I've seen this before).
'back' says the letters should be written in reverse.
'laid' in reverse letter order is 'DIAL'.
(Other definitions for dial that I've seen before include "Select a telephone number" , "Face of a timepiece" , "Laid up like clock-face" , "Meter face" , "Face with numbers" .)