Conservative spouted air in speech (4)
I believe the answer is:
blue
'conservative' is the definition.
(I've seen this before)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for blue that I've seen before include "This could be royal or navy" , "See 7 Across" , "Indecent" , "navy perhaps" , "Spend all at once - colour" .)