Revolutionary Communist capital, say, split between Arabia and Africa (3,3)
I believe the answer is:
red sea
'split between arabia and africa' is the definition.
I can't tell whether this defines the answer.
'revolutionary communist capital say' is the wordplay.
'revolutionary' becomes 'red' (informal term for communist).
'capital' indicates taking the first letters.
'say' indicates a 'sounds like' (homophone) clue.
The initial letter of 'communist' is 'c'.
'c' is a homophone of 'sea'.
'red'+'sea'='RED SEA'
Can you help me to learn more?
(Other definitions for red sea that I've seen before include "Colourful body of water between N Africa and Arabian peninsula" , "Water between Africa and Asia" , "Arm of the Indian Ocean leading to the Suez Canal" , "It divides Arabia/Africa" , "What the Suez canal links with the Mediterranean" .)