Crossword Genius

Bishop wasted some on cleaner (5)

Ross

I believe the answer is:

besom

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

'bishop wasted some on' is the wordplay.
'bishop' becomes 'b' (chess abbreviation).
'wasted' indicates an anagram.
'on' is an insertion indicator (as in clothing 'on' a person).
'some' with letters rearranged gives 'esom'.
'b' put inside 'esom' is 'BESOM'.

Can you help me to learn more?

(Other definitions for besom that I've seen before include "sweeper" , "Broom made from twigs tied to a handle" , "Sweeping item" , "Twig broom" , "Twig-broom" .)

I've seen this clue in The Mirror.
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