Strut surely has broken inside for example (6)
I believe the answer is:
sashay
'strut surely' is the definition.
(to sashay is to strut confidently)
'has broken inside for example' is the wordplay.
'broken' indicates an anagram.
'inside' means one lot of letters goes inside another.
'for example' becomes 'say' ('say' can be used to introduce an example).
'has' with letters rearranged gives 'ash'.
'ash' going inside 'say' is 'SASHAY'.
(Other definitions for sashay that I've seen before include "move with flamboyance" , "Move glidingly" , "Walk exaggeratedly" , "Walk showily" , "parade" .)