Really good rousing start for a tune (3)
I believe the answer is:
air
'a tune' is the definition.
(air can mean a piece of music)
'really good rousing start' is the wordplay.
'really good' becomes 'ai' (I can't explain this - if you can you should give a lot more credence to this answer).
'start' says to take the initial letters.
The initial letter of 'rousing' is 'r'.
'ai'+'r'='AIR'
'for' acts as a link.
Can you help me to learn more?
(Other definitions for air that I've seen before include "Feel" , "Song; ventilate" , "distinctive quality" , "Bearing, manner" , "Ventilate with oxygen" .)