Should after Thursday be considered (7)
I believe the answer is:
thought
'be considered' is the definition.
(I've seen this before)
'should after thursday' is the wordplay.
'should' becomes 'ought' ('ought' can be a synonym of 'should').
'after' means one lot of letters go next to another.
'thursday' becomes 'th' ('Th' can be a synonym of 'thursday').
'ought' after 'th' is 'THOUGHT'.
(Other definitions for thought that I've seen before include "Deliberated" , "Performed brain operations" , "Idea, opinion" , "Philosopher must master this" , "Idea, concept" .)