Note some losses are rising (3)
I believe the answer is:
sol
'rising' is the definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.
'note some losses' is the wordplay.
'note' becomes 'so' (musical note).
'some' indicates taking the first letters.
The first letter of 'losses' is 'l'.
'so'+'l'='SOL'
'are' acts as a link.
Can you help me to learn more?
(Other definitions for sol that I've seen before include "Note, old french coin" , "Roman sun-god" , "Roman counterpart of Helios" , "A Latin sun" , "Spanish and poetic sun" .)