Minute Cryptic

Our definition here is 'Sinking Capital' and our answer will be a word for that.

This clue's indicators are 'Weathered', 'adorning', and 'the outskirts of'. One of these is a selection indicator naming the positions of important letters in neighbouring fodder. Another is an anagram indicator - some nearby fodder will degrade, its structure will collapse and its letters will rearrange. And a third is a containing indicator telling us to put some fodder around the outside of other fodder.

This clue's fodder is 'tin sign' and 'Venice'. We'll use these letters (or some of them) to construct our answer, as guided by the clue's indicator(s).