Popular Conservative policy that's not on the level (7)
I believe the answer is:
incline
'the level' is the definition.
(thesaurus)
'popular conservative policy' is the wordplay.
'popular' becomes 'in'.
'conservative' becomes 'c' (abbreviation commonly used in UK politics).
'policy' becomes 'line' (I've seen this before).
'in'+'c'+'line'='INCLINE'
'that's not on' is the link.
This may not be correct. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for incline that I've seen before include "Tend; lean" , "Lean, slope" , "bow" , "prejudice" , "Have tendency or slope" .)