Start jeering short match official with diamonds in one-piece garment (4,4)
I believe the answer is:
jump suit
'garment' is the definition.
(I know that jump suit is a type of garment)
'start jeering short match official with diamonds in one-piece' is the wordplay.
I cannot really understand how this works, but
'start' could be 'jump' (synonyms) and 'jump' is found within the answer.
'match' could be 'suit' (suiting is a kind of matching) and 'suit' is located in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for jump suit that I've seen before include "All-in-one garment" , "It may be put on" , "Paratrooper's garment" , "Combined trousers and jacket or shirt" , "(Para's) one-piece garment" .)