Crossword Genius

Flats - and what can fix them? (5)

Ross

I believe the answer is:

pumps

I'm a little stuck... Click here to teach me more about this clue!

'flats' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe there's a link between them I don't understand?

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for pumps that I've seen before include "causes of inflation?" , "Forces liquid to move; light shoes" , "Cycle attachments" , "footwear" , "Dancing shoes - may be manned!" .)

I've seen this clue in The Irish Times.
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