Examination of fools, blokes blocking street (10)
I believe the answer is:
assessment
'examination' is the definition.
(I've seen this before)
'fools blokes blocking street' is the wordplay.
'fools' becomes 'asses' (ass is a kind of fool**).
'blokes' becomes 'men' (I've seen this in other clues).
'blocking' means one lot of letters goes inside another.
'street' becomes 'st'.
'men' going within 'st' is 'sment'.
'asses'+'sment'='ASSESSMENT'
'of' acts as a link.
(Other definitions for assessment that I've seen before include "Judgement" , "rating" , "Opinion" , "Survey" , "Review" .)