Flashy playing won Murray admirers in seconds (4)
I believe the answer is:
load
'flashy playing won' is the definition.
The answer and definition can be both quantities as well as being singular nouns.
Perhaps you can see an association between them that I don't see?
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for load that I've seen before include "A heavy burden" , "Goods carried by a large vehicle" , "that's put on commercial vehicle" , "Weigh down" , "Weight, source of pressure" .)