Gardeners wear it and keep working

I believe the answer is:

kneepad

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'gardeners wear it' is the definition.
I can't tell whether this definition defines the answer.

'and keep working' is the wordplay.
'working' is an anagram indicator.
'and'+'keep'='andkeep'
'andkeep' anagrammed gives 'KNEEPAD'.

Can you help me to learn more?

(Other definitions for kneepad that I've seen before include "Joint guard" , "protection for joints" .)

I've seen this clue in The Daily Mail.

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