Shocking those running the meetings with seats presumably in the Irish Senior Citizens' parliament?

I believe the answer is:

rocking-chairs

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'running the meetings with seats presumably in the irish senior citizens' parliament?' is the definition.
I don't know anything about this answer so I cannot tell whether it can be defined by this definition.

'shocking those' is the wordplay.
'shocking' becomes 'rocking' (I've seen this before).
'those' becomes 'chairs' (I can't justify this - if you can you should believe this answer much more).
'rocking'+'chairs'='ROCKING-CHAIRS'

Can you help me to learn more?

I've seen this clue in the Irish Times.

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