Rising river for ages? What Monteverdi worked on in Venice! (6)
I believe the answer is:
operas
'what monteverdi worked on in venice' is the definition.
I can't tell whether this definition defines the answer.
'rising river for ages?' is the wordplay.
'rising' shows that the letters should be reversed in order (going up in a down clue).
'river' becomes 'po' (Po is an example).
'for' means one lot of letters go next to another.
'ages?' becomes 'eras' (I've seen this before).
'po' backwards is 'op'.
'op'+'eras'='OPERAS'
Can you help me to learn more?
(Other definitions for operas that I've seen before include "Stage dramas" , "eg Faust, Salome" , "La Traviata, Aida" , "Plays in which the words are sung" , "Musical plays" .)