Unexpectedly opened and worn, oddly - suggesting it's this? (8)

'it's this?' is the definition.
The definition suggests a singular noun but the answer is not.

'unexpectedly opened and worn oddly' is the wordplay.
'unexpectedly' is an anagram indicator.
'and' is a charade indicator (letters next to each other).
'oddly' indicates alternate letters (letters in odd-numbered positions).
The alternate letters of 'worn' are 'wr'.
'opened'+'wr'='openedwr'
'openedwr' is an anagram of 'PREOWNED'.

'suggesting' is the link.

Can you help me to learn more?