Stayed in middle of Colditz with English officer (5)
I believe the answer is:
dwelt
'stayed' is the definition.
(I've seen this before)
'middle of colditz with english officer' is the wordplay.
'middle of' indicates the central letters.
'with' becomes 'w' (abbreviation).
'english' becomes 'E' (abbreviation).
'officer' becomes 'lt' (abbreviation for lieutenant).
The middle of 'colditz' is 'd'.
'd'+'w'+'e'+'lt'='DWELT'
'in' is the link.
(Other definitions for dwelt that I've seen before include "was established" , "Put much stress (on)" , "hung out" , "Persistently thought" , "I dreamt I . . . in marble halls (song)" .)