Rising pitch gentle, but not entirely clear (7)
I believe the answer is:
evident
'clear' is the definition.
(synonyms)
'rising pitch gentle but not entirely' is the wordplay.
I cannot really understand how this works, but
'not' could be 'nt' (synonyms) and 'nt' is present in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for evident that I've seen before include "Readily apparent" , "Plain, obvious, clear" , "Visible - plain" , "Incontrovertible" , "Obvious - 1 across" .)