A new unexciting job collecting silver as a source of security (9)
I believe the answer is:
anchorage
'a source of security' is the definition.
(I've seen this before)
'a new unexciting job collecting silver' is the wordplay.
'a new' becomes 'an' (I've seen this in other clues).
'unexciting job' becomes 'chore'.
'collecting' indicates putting letters inside.
'silver' becomes 'ag' (Ag is the chemical symbol for silver).
'chore' going around 'ag' is 'chorage'.
'an'+'chorage'='ANCHORAGE'
'as' is the link.
(Other definitions for anchorage that I've seen before include "recluse's cell?" , "Place for ship to stay - Alaska city" , "sailors get attached to such a place" , "large northern city" , "Place where ships may stay safely - in city in Alaska?" .)