Friendly note within an urgent message? (8)
I believe the answer is:
amicable
'friendly' is the definition.
(similar in meaning)
'note within an urgent message?' is the wordplay.
'note' becomes 'mi' (as in 'do re mi').
'within' means one lot of letters goes inside another.
'an' becomes 'a'.
'urgent message?' becomes 'cable' (as in sending a cable to someone. I am not sure about the 'urgent' bit.).
'a'+'cable'='acable'
'mi' inserted into 'acable' is 'AMICABLE'.
Can you help me to learn more?
(Other definitions for amicable that I've seen before include "Friendly and sociable" , "Easy to approach" , "Male cab I change to, just to be friendly" , "Of friendly disposition, good-natured" , "Friendly, unthreatening" .)