'Momentum' politician visiting Europe wearing scruffy suit (7)
I believe the answer is:
impetus
'momentum' is the definition.
(I've seen this in another clue)
'politician visiting europe wearing scruffy suit' is the wordplay.
'politician' becomes 'mp' (Member of Parliament).
'visiting' is a charade indicator (letters next to each other).
'europe' becomes 'e' (this could be a standard abbreviation which I don't know about).
'wearing' means one lot of letters goes inside another.
'scruffy' indicates anagramming the letters.
'mp'+'e'='mpe'
'suit' anagrammed gives 'itus'.
'mpe' going inside 'itus' is 'IMPETUS'.
Can you help me to learn more?
(Other definitions for impetus that I've seen before include "Thrust" , "Incentive - time's up (anag)" , "influence" , "Drive" , "Catalyst" .)