Evaluation of beasts of burden soldiers found in street (10)
I believe the answer is:
assessment
'evaluation' is the definition.
(I know that evaluation can be written as assessment)
'beasts of burden soldiers found in street' is the wordplay.
'beasts of burden' becomes 'asses' (I've seen this in another clue).
'soldiers' becomes 'men' (men can mean a group of soldiers).
'found in' means one lot of letters goes inside another.
'street' becomes 'st' (abbreviation).
'men' put into 'st' is 'sment'.
'asses'+'sment'='ASSESSMENT'
'of' acts as a link.
(Other definitions for assessment that I've seen before include "rating" , "test" , "Examination" , "Judgement" , "amount to be paid" .)