Gave thought to Tory team on the left (10)
I believe the answer is:
'gave thought to' is the definition.
(to consider something is to give it thought)
'tory team on the left' is the wordplay.
'tory' becomes 'con' (abbreviation for conservative).
'team' becomes 'side' (both can mean a sports team).
'on the left' becomes 'red' (red can mean leftwing).
(Other definitions for considered that I've seen before include "Believed to be" , "respected" , "Deliberated" , "Thought carefully about" , "Looked at" .)