Services don't start because of such idiots (5)
I believe the answer is:
asses
'such idiots' is the definition.
'asses' can be an answer for 'idiots' (I've seen this before). I am unsure of the 'such' bit.
'services don't start' is the wordplay.
'services' becomes 'masses' (Mass is a church service).
'don't start' means to remove the first letter.
'masses' with its initial letter taken off is 'ASSES'.
'because of' acts as a link.
Can you help me to learn more?
(Other definitions for asses that I've seen before include "dim bulbs?" , "More than one fool" , "not the most sensible types" , "Dolts" , "Fools; beasts of burden" .)