One held in a house with broken gates? (7)
I believe the answer is:
hostage
'one held' is the definition.
(I've seen this before)
'a house with broken gates?' is the wordplay.
'a house' becomes 'ho' (abbreviation for house).
'with' is a charade indicator (letters next to each other).
'broken' indicates anagramming the letters.
'gates' with letters rearranged gives 'stage'.
'ho'+'stage'='HOSTAGE'
'in' acts as a link.
(Other definitions for hostage that I've seen before include "One held for money" , "Prisoner kept as security" , "One caught" , "Captive held for ransom" , "Prisoner held as security" .)