Call doctor then elope (9)
I believe the answer is:
telephone
'call' is the definition.
('telephone' can be a synonym of 'call')
'doctor then elope' is the wordplay.
'doctor' is an anagram indicator.
'then'+'elope'='thenelope'
'thenelope' with letters rearranged gives 'TELEPHONE'.
(Other definitions for telephone that I've seen before include "Communications device" , "Communication device" , "Electronic sound equipment" , "Communicating tool" , "Transmitter of speech, and now text and pictures" .)