Aid, when given (5)
I believe the answer is:
asset
'aid' is the definition.
The answer and definition can be both human attributes as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'when given' is the wordplay.
'when' becomes 'as' (eg 'when I walked' means 'as I walked').
'given' becomes 'set' (I am not sure about this - if you are sure you should believe this answer much more).
'as'+'set'='ASSET'
Can you help me to learn more?
(Other definitions for asset that I've seen before include "Item well worth having" , "Something valuable to have" , "Strong point" , "virtue" , "Help" .)