Persevere though terrible cheapskate won't supply cash (4,2)
I believe the answer is:
keep at
'persevere' is the definition.
(I've seen this in another clue)
'terrible cheapskate won't supply cash' is the wordplay.
I cannot quite see how this works, but
'cash' could be 'pat' (tennis player Pat Cash) and 'pat' is found within the answer.
The remaining letters 'kee' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
'though' acts as a link.
Can you help me to learn more?
(Another definition for keep at that I've seen is " persist".)