Cricket match on well-tended ground that's used for trials (4,3)
I believe the answer is:
test bed
'well-tended ground that's used for trials' is the definition.
I can't tell whether this definition defines the answer.
'cricket match on' is the wordplay.
'cricket' becomes 'bed' (I can't explain this - if you can you should give a lot more credence to this answer).
'match' becomes 'test' (as in a test match in cricket).
'on' means one lot of letters go next to another.
'bed' after 'test' is 'TEST-BED'.
Can you help me to learn more?
(Other definitions for test bed that I've seen before include "trial equipment" , "place for experimental trials" , "Practise sleeping" , "engineers are working on it" .)