Christian was one turning cheek, resolute (7)
I believe the answer is:
pilgrim
'christian' is the definition.
(I've seen this before)
'one turning cheek resolute' is the wordplay.
'one turning' is a reversal indicator.
'cheek' becomes 'lip' (both can mean insolence or rudeness).
'resolute' becomes 'grim' (I've seen this before).
'lip' in reverse letter order is 'pil'.
'pil'+'grim'='PILGRIM'
'was' is the link.
(Other definitions for pilgrim that I've seen before include "One of those who sailed to New England in the Mayflower, 1620" , "Traveller to a holy place" , "these early Fathers" , "Palmer" , "One travelling to a sacred place" .)