Nearly finished thanks to elle and chrisie. But cant get 21d.old landlord abroad brought up drink.(4) ?a?a
Also dont fully understand answers to 16d and 16a. Euro say in fair slump after turmoil with no end of grief ' mercurial' and Noted mechant given secand look to take in catholic work 'Maro Polo
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Is that the whole clue ? If it were "Euro, say, in a fair slump after turmoil with no end of grief " it would be an anagram of a fair slump, without f - end of grief - to give marsupial, with Euro related very loosely to Roo?