Crossword Genius

Pump gallons before turning over my small garden (3,4)

Ross

I believe the answer is:

gym shoe

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

'pump' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps you can see an association between them that I don't see?

'gallons before turning over my small garden' is the wordplay.
'gallons' becomes 'G' (abbreviation).
'before' says to put letters next to each other.
'turning over' is a reversal indicator.
'small' becomes 's' (abbreviation - e.g. clothes size).
'garden' becomes 'hoe' (to garden could mean to hoe).
'my' back-to-front is 'ym'.
'g'+'ym'+'s'+'hoe'='GYM SHOE'

Can you help me to learn more?

(Another definition for gym shoe that I've seen is " It has gripping 'soul', you might say".)

I've seen this clue in The Telegraph.
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