Ex-PM is hosting European leader's kids in uniform (7,6)

'kids in uniform' is the definition.
I know nothing about this answer so I cannot judge whether this works.

'ex-pm is hosting european leader's' is the wordplay.
I cannot really understand how this works, but
'pm' could be 'brown' (I have seen 'Former PM ' mean 'brown' so perhaps 'pm' could also mean 'brown') and 'brown' is present in the answer.
'european' could be 'e' (abbreviation e.g. EU) and 'e' is located in the answer.
'leader's' could be 'guides' (guide is a kind of leader) and 'guides' is found in the answer.
A single letter 'i' remains which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?