More inflexible renters relocated (7)
I believe the answer is:
sterner
'more inflexible' is the definition.
('stern' can be similar in meaning to 'inflexible')
'renters relocated' is the wordplay.
'relocated' is an anagram indicator (letters get relocated).
'renters' is an anagram of 'STERNER'.
(Other definitions for sterner that I've seen before include "Renters of more strict sort" , "More grimly serious" , "More demanding" , "More severe" , "more inflexible anyway" .)