Toadies succeeded splitting peninsular republic (3,3)

I believe the answer is:

yes men

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'toadies' is the definition.
(I've seen this before)

'succeeded splitting peninsular republic' is the wordplay.
'succeeded' becomes 's' (genealogical abbreviation).
'splitting' means one lot of letters goes inside another.
'peninsular republic' becomes 'yemen' (I've seen this before. I am not sure about the 'peninsular' bit.).
's' inserted into 'yemen' is 'YES-MEN'.

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(Other definitions for yes men that I've seen before include "Willing conformers" , "Obedient camp-followers" , "Flunkeys" , "They always agree with a superior" , "Toadies" .)

I've seen this clue in The Times.

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