Given up to the faithful (7)
I believe the answer is:
devoted
This could be a double definition.
'given up' is the first definition.
'devoted' can be an answer for 'given' ('devote' can be a synonym of 'give'). I'm not certain of the 'up' bit.
'the faithful' is the second definition.
(I've seen this before)
'to' is the link.
Can you help me to learn more?
(Other definitions for devoted that I've seen before include "Loving and loyal" , "Dedicated or wholly given up to" , "Strongly attached (to)" , "Faithful" .)