Orchestra tea; few members as it may claim that rain is coming (7,8)
I believe the answer is:
weather forecast
'it may claim that rain is coming' is the definition.
The definition suggests a singular noun which matches the answer.
'orchestra tea few members' is the wordplay.
'members' indicates an anagram (members or parts of the anagram in a different way).
'orchestra'+'tea'+'few'='orchestrateafew'
'orchestrateafew' anagrammed gives 'WEATHER FORECAST'.
'as' acts as a link.
Can you help me to learn more?
(Other definitions for weather forecast that I've seen before include "Predicton" , "Met objective" , "item after news" , "prediction" .)