Stiff-necked Bob turns awkwardly (8)
I believe the answer is:
stubborn
'stiff-necked' is the definition.
(similar in meaning)
'bob turns awkwardly' is the wordplay.
'awkwardly' is an anagram indicator.
'bob'+'turns'='bobturns'
'bobturns' is an anagram of 'STUBBORN'.
(Other definitions for stubborn that I've seen before include "Obstinate, bullheaded" , "Rigid" , "Obstinate, mulish" , "intractable" , "Difficult to move" .)