In more ways than one, it's not on the level (4)
I believe the answer is:
ramp
'in more ways' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'than one it's not on the level' is the wordplay.
'than' becomes 'ram' (I can't justify this - if you can you should give a lot more credence to this answer).
'one it's not' is a deletion indicator.
'on' becomes 'to'.
'the level' becomes 'top' (top is a kind of level).
'top' with 'to' taken away is 'p'.
'ram'+'p'='RAMP'
Can you help me to learn more?
(Other definitions for ramp that I've seen before include "Smoothed-out stairs" , "Short slope" , "Inclined surface - swindle" , "run around" , "Sloping surface; swindle" .)