Article removed from slope off ramp (7)
I believe the answer is:
slipway
'ramp' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps you can see an association between them that I can't see?
'article removed from slope off' is the wordplay.
'article' becomes 'a' (the indefinite article in English).
'removed from' is a deletion indicator.
'slope off' becomes 'slip away' (both can mean to decrease or vanish).
'slipaway' with 'a' taken away is 'SLIPWAY'.
Can you help me to learn more?
(Other definitions for slipway that I've seen before include "Launch slope for ships" , "Launch ramp" , "Launching place" , "where vessels are launched" .)