Woman tended first to come down to archipelago (8)
I believe the answer is:
shetland
'to archipelago' is the definition.
(I have seen 'Scottish archipelago ' mean 'shetland' so perhaps 'archipelago' could also mean 'shetland')
'woman tended first to come down' is the wordplay.
'woman' becomes 'she' ().
'tended first' becomes 't' (sst letter of 'tended').
'to come down' becomes 'land' (to land is to come down after flying).
'she'+'t'+'land'='SHETLAND'
(Other definitions for shetland that I've seen before include "remote location?" , "Scottish island group" , "sort of sheep" , "Island group off the coast of Scotland" , "islands with H > [HORSE]" .)