Band with iron around edge (6)

I believe the answer is:

fringe

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'edge' is the definition.
(I know that fringe is a type of edge)

'band with iron around' is the wordplay.
'band with' becomes 'ring' (a ring is a band of metal. I am not sure about the 'with' bit.).
'iron' becomes 'fe' (Fe is the chemical symbol for iron).
'around' indicates putting letters inside.
'ring' inserted inside 'fe' is 'FRINGE'.

Can you help me to learn more?

(Other definitions for fringe that I've seen before include "Border - unofficial festival events" , "Border; hair on brow" , "Perimeter" , "Hair hanging over the forehead" , "Less important" .)

I've seen this clue in The Guardian.

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