Past President's cleaner? (6)

I believe the answer is:

hoover

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This might be a double definition.

'past president's' is the first definition.
'hoover' can be an answer for 'president's' (I've seen this before). I'm not sure about the 'past' bit.

'cleaner?' is the second definition.
(I've seen this before)

Can you help me to learn more?

(Other definitions for hoover that I've seen before include "Vacuum cleaner of the old American president" , "J Edgar ...... was FBI boss." , "J Edgar . . . . . . was FBI chief" , "US president, 1929-33" , "US president in House throughout" .)

I've seen this clue in The Irish Independent.

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