Bent hip, 100 and wrinkled (8)
I believe the answer is:
inclined
'bent' is the definition.
(synonyms)
'hip 100 and wrinkled' is the wordplay.
'hip' becomes 'in' (I've seen this in other clues).
'100' becomes 'c' (Roman numeral).
'and' is a charade indicator (letters next to each other).
'wrinkled' becomes 'lined' (I've seen this before).
'in'+'c'+'lined'='INCLINED'
(Other definitions for inclined that I've seen before include "Tended towards" , "Disposed; sloping" , "Sloped or disposed" , "Well-disposed" , "Had a tendency" .)