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Domestic
equipment
now
may
be
so
fashionable
(5)
Domestic equipment now may be so fashionable (5)
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The whole clue is the definition (& lit or double definition).
How the clue works
This is a double definition where both halves clue fashionable meaning SMART. Modern domestic equipment may be described as SMART (smart appliances), and SMART also means fashionable or stylish.