Crossword Genius

Tape is compulsory (7)

Ross

I believe the answer is:

binding

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This could be a double definition.

'tape' is the first definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe you can see a link between them that I don't see?

'compulsory' is the second definition.
(thesaurus)

'is' acts as a link.

Can you help me to learn more?

(Other definitions for binding that I've seen before include "Mandatory" , "Obligatory" , "work for a bookmaker" .)

I've seen this clue in The Mirror.
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