Wee collected by clinician north of a Caribbean country (8)
I believe the answer is:
dominica
'caribbean country' is the definition.
(country in the Caribbean)
'wee collected by clinician north of a' is the wordplay.
'wee collected by clinician' becomes 'dominic' (I can't justify this - if you can you should give a lot more credence to this answer).
'north of' means one lot of letters go next to another (in a down clue, some letters go above others).
'dominic'+'a'='DOMINICA'
Can you help me to learn more?
(Other definitions for dominica that I've seen before include "Largest of the Windward Islands" , "former British colony" , "country" , "Miss Sunday" , "Caribbean island nation" .)