Start song in the great outdoors (4,3)
I believe the answer is:
open air
'great outdoors' is the definition.
'open air' can be an answer for 'outdoors' (synonyms). I am unsure of the 'great' bit.
'start song' is the wordplay.
'start' becomes 'open' (opening is a kind of starting).
'song' becomes 'air' (I've seen this in another clue).
'open'+'air'='OPEN-AIR'
'in the' acts as a link.
Can you help me to learn more?
(Other definitions for open air that I've seen before include "in the country?" , "natural setting" , "concerts?" , "kind of concert" , "not doing covers?" .)