Large pet damaged hotel cable (9)
I believe the answer is:
telegraph
'cable' is the definition.
(I know that cable can be written as telegraph)
'large pet damaged hotel' is the wordplay.
'damaged' indicates an anagram.
'hotel' becomes 'h' (phonetic alphabet: alpha, bravo, charlie etc.).
'large'+'pet'='largepet'
'largepet' with letters rearranged gives 'telegrap'.
'telegrap'+'h'='TELEGRAPH'
(Other definitions for telegraph that I've seen before include "Send message" , "paper" , "Transmission (by wire on poles)" , "It's used for communications over wires" , "Signal" .)