When about right, they can be fine (4)
I believe the answer is:
arts
'they can be fine' is the definition.
The definition suggests an adverb but the answer is not.
'when about right' is the wordplay.
'when' becomes 'as' (eg 'when I walked' means 'as I walked').
'about' indicates putting letters inside.
'right' becomes 'rt' (abbreviation as in Rt Hon- the Right Honourable).
'as' going around 'rt' is 'ARTS'.
Can you help me to learn more?
(Other definitions for arts that I've seen before include "Poetry, music, painting etc." , "Aesthetic pursuits for rats" , "Non-science subjects" , "Aesthetic products for star" , "Humanities" .)