Some PCs work these things out (6)
I believe the answer is:
nights
'some pcs work these' is the definition.
The definition suggests an adverb but the answer is not.
'things out' is the wordplay.
'out' indicates anagramming the letters (out can mean wrong or inaccurate).
'things' with letters rearranged gives 'NIGHTS'.
Can you help me to learn more?
(Other definitions for nights that I've seen before include "Periods after sunset" , "Times between days" , "Periods of darkness" , "See 9" , "dark times" .)