Alaskan city has an unpleasant duty collecting silver (9)
I believe the answer is:
anchorage
'alaskan city' is the definition.
(Anchorage is a city in Alaska)
'an unpleasant duty collecting silver' is the wordplay.
'unpleasant duty' becomes 'chore' (chore is a kind of duty. I am not sure about the 'unpleasant' bit.).
'collecting' means one lot of letters goes inside another.
'silver' becomes 'Ag' (Ag is the chemical symbol for silver).
'chore' placed around 'ag' is 'chorage'.
'an'+'chorage'='ANCHORAGE'
'has' acts as a link.
Can you help me to learn more?
(Other definitions for anchorage that I've seen before include "Place for ship to rest securely, and Alaskan seaport" , "Alaskan port" , "where you might fnd a refuge" , "US port" , "US city" .)