Give somebody a ring, then elope in disguise (9)
I believe the answer is:
telephone
'give somebody a ring' is the definition.
'then elope in disguise' is the wordplay.
'in disguise' indicates an anagram.
'then'+'elope'='thenelope'
'thenelope' is an anagram of 'TELEPHONE'.
(Other definitions for telephone that I've seen before include "Electronic sound equipment" , "Transmitter of speech, and now text and pictures" , "Book with an alphabetical list of subscribers and numbers" , "It transmits speech at a distance" , "Worldwide system of communication" .)