Strange locations featuring intro to Cockney Rebel (10)
I believe the answer is:
iconoclast
'rebel' is the definition.
(I've seen this before)
'strange locations featuring intro to cockney' is the wordplay.
'strange' indicates an anagram.
'featuring' indicates putting letters inside.
'intro to' indicates taking the first letters (I've seen 'intros to' mean this).
The first letter of 'cockney' is 'c'.
'locations' is an anagram of 'iconolast'.
'iconolast' enclosing 'c' is 'ICONOCLAST'.
(Other definitions for iconoclast that I've seen before include "Critic of faith" , "Unorthodox thinker" , "A dissident" , "heretic" , "Challenging type" .)