It may be played on the lawn in summer (8)
I believe the answer is:
hosepipe
'it may be played on the lawn in summer' is the definition.
The definition suggests a singular noun which matches the answer.
This is the entire clue.
Can you help me to learn more?
(Other definitions for hosepipe that I've seen before include "used to water" , "Use this in garden" , "It's used in watering" , "Flexible watering tube" , "it will water garden" .)