Publisher putting pressure - too much - on wheel (9)

I believe the answer is:

podcaster

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'publisher' is the definition.
Both the answer and definition are singular nouns.
Maybe they are linked in a way I don't understand?

'pressure too much on wheel' is the wordplay.
'pressure' becomes 'p' (abbreviation).
'too much' becomes 'od' (abbreviation for overdose).
'on' means one lot of letters go next to another.
'wheel' becomes 'caster' (small wheel attached to a large object).
'p'+'od'+'caster'='PODCASTER'

'putting' is the link.

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I've seen this clue in The Daily Express.

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