Article in wrought iron, exotic source of abrasion (11)

'article' is the definition.
The definition and answer can be both related to communication as well as being singular nouns.
Maybe they are linked in a way I don't understand?

'wrought iron exotic source of abrasion' is the wordplay.
'wrought' is an anagram indicator (wrought means beaten or shaped into form).
'source of' indicates taking the first letters (the start - or source - of the word).
The initial letter of 'abrasion' is 'a'.
'iron'+'exotic'+'a'='ironexotica'
'ironexotica' with letters rearranged gives 'EXCORIATION'.

'in' is the link.

Can you help me to learn more?