Source of cruel letters to the Football Association? (4)
I believe the answer is:
uefa
'source of cruel letters' is the definition.
I know nothing about this answer so I can't judge whether it can be defined by this definition.
'the football association?' is the wordplay.
I cannot quite see how this works, but
'football association?' could be 'fa' (abbreviation) and 'fa' is located in the answer.
This may be the basis of clue (or it may be nonsense).
'to' is the link.
Can you help me to learn more?
(Other definitions for uefa that I've seen before include "Governing body of soccer in Europe" , "Sporting administrator" , "Soccer union (abbrev.)" , "Football cup" , "Organisers of Champions League" .)