Tend not to be on the level (7)
I believe the answer is:
incline
I believe this is a triple definition!
'tend not' is the first definition.
'incline' can be an answer for 'tend' (synonyms). I am unsure of the 'not' bit.
'to be' is the second definition.
(inclining is a kind of being)
'on' acts as a link.
'the level' is the third definition.
(thesaurus)
Can you help me to learn more?
(Other definitions for incline that I've seen before include "Bend forwards" , "Tend; lean" , "Lean, slope" , "bow" , "Lean (towards)" .)