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The ___ Precaution (alternate title of The Barber of Seville), 7 letters

Dysfunctional, 7 letters

Environmental slogan, or a hint to this puzzle's theme answers, 7 letters

Futile, 7 letters

Good for nothing, 7 letters

Having no point, 7 letters

Idle, 7 letters

Ineffectual, 7 letters

Kaput, 7 letters

Like a fifth wheel, 7 letters

Not worth a dime, 7 letters

Not worth a plugged nickel, 7 letters

Not worth two cents, 7 letters

Of no value, 7 letters

Otiose, 7 letters

Serving no purpose, 7 letters

Sisyphean, 7 letters

To no avail, 7 letters

Vain, 7 letters

In an unavailing manner, 9 letters

In vain, 9 letters

To no avail, 9 letters

Obsolescence, in a way, 11 letters

The quality of having to practical use, 11 letters

Part 3 of remark, 13 letters

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