Foreign currency earners in old harbour towns? (7)
I believe the answer is:
exports
'foreign currency earners' is the definition.
(I've seen this before)
'old harbour towns?' is the wordplay.
'old' becomes 'ex'.
'harbour towns?' becomes 'ports' (I can't justify this - if you can you should believe this answer much more).
'ex'+'ports'='EXPORTS'
'in' acts as a link.
Can you help me to learn more?
(Other definitions for exports that I've seen before include "Goods or services sold abroad" , "goods going abroad" , "Foreign currency earners" , "Imports & - -" , "sends abroad" .)