Test two things paint can do (3,3)
I believe the answer is:
dry run
'paint can do' is the definition.
Although both the answer and definition are singular nouns, I don't see how one could define the other.
'test two' is the wordplay.
I cannot quite see how this works, but
'test' could be 'run' (synonyms) and 'run' is present in the answer.
The remaining letters 'dry' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
'things' acts as a link.
Can you help me to learn more?
(Other definitions for dry run that I've seen before include "Procedure rehearsal" , "A dummy test - sounds thirsty" , "Test procedure like arid trot" , "Kind of rehearsal like thirsty trot" , "event staged by AA?" .)