Union disorganised by a fuel shortage? (4)
I believe the answer is:
uefa
'fuel shortage?' is the definition.
I don't know anything about this answer so I cannot judge whether this works.
'union disorganised by a' is the wordplay.
'union' becomes 'U' (common abbreviation as in Trades Union Congress).
'disorganised by' becomes 'ef' (I can't explain this - if you can you should give a lot more credence to this answer).
'u'+'ef'+'a'='UEFA'
Can you help me to learn more?
(Other definitions for uefa that I've seen before include "Organisers of Champions League" , "Sporting administrator" , "Governing body of soccer in Europe" , "European soccer association" , "Soccer union (abbrev.)" .)