Easterly wind going over grand foreign capital (4)
I believe the answer is:
riga
'foreign capital' is the definition.
'Riga' can be an answer for 'capital' (capital of Latvia). I'm not certain of the 'foreign' bit.
'easterly wind going over grand' is the wordplay.
'easterly' says the letters should be written in reverse (the word seen from the right or \'east\').
'wind' becomes 'air' (air is a kind of wind).
'going over' is an insertion indicator.
'grand' becomes 'g' (G is short for grand as in a thousand).
'air' placed around 'g' is 'agir'.
'agir' backwards is 'RIGA'.
Can you help me to learn more?
(Other definitions for riga that I've seen before include "Baltic port" , "Latvian capital" , "trading centre in Latvia" , "port in Latvia" , "Latvian port" .)