Determination to work at this puzzle again (7)
I believe the answer is:
resolve
'determination' is the definition.
(I've seen this in another clue)
'work at this puzzle again' is the wordplay.
I cannot quite see how this works, but
'work' could be 'solve' (synonyms) and 'solve' is present in the answer.
'again' could be 're' (prefix meaning 'again') and 're' is found in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
'to' is the link.
Can you help me to learn more?
(Other definitions for resolve that I've seen before include "Fix" , "Determine with conviction" , "Settle, conclude" , "Settle (a dispute)" , "Firmly decide" .)