Unclear that king covered in Times (6)
I believe the answer is:
bleary
'unclear' is the definition.
(I've seen this in another clue)
'king covered in times' is the wordplay.
'king' becomes 'lear' (King Lear).
'covered in' indicates putting letters inside.
'times' becomes 'by' (both can mean 'multiplied by').
'lear' placed inside 'by' is 'BLEARY'.
'that' acts as a link.
(Other definitions for bleary that I've seen before include "Tired and unfocused" , "not clear" , "Like the unfocused vision" , "lacking focused vision" , "Blurred" .)