Throw uniform on top of sewer in anger (8)
I believe the answer is:
unsettle
'throw' is the definition.
(throw can mean to unsettle or disturb)
'uniform on top of sewer in anger' is the wordplay.
'uniform' becomes 'U' (phonetic alphabet: alpha, bravo, charlie etc.).
'on top of' says to take the initial letters.
'in' indicates putting letters inside.
'anger' becomes 'nettle' (nettle can mean to irritate or anger).
The first letter of 'sewer' is 's'.
's' going into 'nettle' is 'nsettle'.
'u'+'nsettle'='UNSETTLE'
(Other definitions for unsettle that I've seen before include "Upset" , "Disturb, disconcert" , "Throw" , "worry" , "'Disturb, unnerve (8)'" .)