Telegram gets daughter nervous (5)
I believe the answer is:
wired
'nervous' is the definition.
(I've seen this before)
'telegram gets daughter' is the wordplay.
'telegram' becomes 'wire' (synonyms).
'gets' means one lot of letters go next to another.
'daughter' becomes 'd' (genealogical abbreviation).
'wire'+'d'='WIRED'
(Other definitions for wired that I've seen before include "Equipped for electrical connection" , "Sent a telegram" , "having Internet connection" , "Nervous" , "Equipped for electricity" .)