Apparent free sheet initially fixed - by this piece of stationery? (5,8)

I believe the answer is:
paper fastener
'this piece of stationery?' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'apparent free sheet initially fixed' is the wordplay.
'initially' indicates taking the first letters.
'fixed' is an anagram indicator.
The first letter of 'sheet' is 's'.
'apparent'+'free'+'s'='apparentfrees'
'apparentfrees' anagrammed gives 'PAPER FASTENER'.
'by' acts as a link.
Can you help me to learn more?
I've seen this clue in The Independent.
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