Conservative affected by tizzy surrounding European window cleaner? (6,7)

'window cleaner?' is the definition.
Although both the answer and definition are singular nouns, I don't understand how one could define the other.

'conservative affected by tizzy surrounding european' is the wordplay.
I cannot really see how this works, but
'conservative' could be 'c' (UK political abbreviation) and 'c' is found in the answer.
'by' could be 'at' and 'at' is found in the answer.
'european' could be 'e' (abbreviation e.g. EU) and 'e' is present in the answer.
This explanation may well be incorrect...

Can you help me to learn more?