Crossword Genius

Punctured tyre fixed by cast-iron bicycle pump? (8)

Ross

I believe the answer is:

inflator

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

'bicycle pump?' is the definition.
'inflator' can be an answer for 'pump?' (I've seen this before). I'm not sure about the 'bicycle' bit.

'punctured tyre fixed by cast-iron' is the wordplay.
'punctured tyre' becomes 'flat' (I've seen this before).
'fixed by' is an insertion indicator (inserted letters are fixed inside).
'cast' is an anagram indicator (letters are dispersed or cast around).
'iron' is an anagram of 'inor'.
'flat' going inside 'inor' is 'INFLATOR'.

Can you help me to learn more?

(Other definitions for inflator that I've seen before include "Balloon filler" , "Air pump" .)

I've seen this clue in The Independent.
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