Determine again to find the answer to (7)
I believe the answer is:
resolve
'determine' is the definition.
(resolving is a kind of determining)
'again to find the answer to' is the wordplay.
'again' becomes 're' (prefix meaning 'again').
'to find the answer to' becomes 'solve' (I've seen this before).
're'+'solve'='RESOLVE'
(Other definitions for resolve that I've seen before include "unravel clues again?" , "12 [STIFF UPPER LIP]" , "break up" , "Decide; firm determination" , "Willpower" .)