While determined to find a good quality in (5)
I believe the answer is:
asset
'find a good quality in' is the definition.
Although both the answer and definition are singular nouns, I cannot see how they can define each other.
'while determined' is the wordplay.
'while' becomes 'as' (eg 'while I walked' means 'as I walked').
'determined' becomes 'set' (similar in meaning).
'as'+'set'='ASSET'
'to' acts as a link.
Can you help me to learn more?
(Other definitions for asset that I've seen before include "A thing of value" , "Seats (anag.)" , "Something useful" , "Tessa (anag)" , "Something of value, worth having" .)