Composer, one from the UK, ahead of a larger number (7)
I believe the answer is:
britten
'composer' is the definition.
(British composer Benjamin Britten)
'one from the uk ahead of a larger number' is the wordplay.
'one from' indicates taking the first letters.
'uk' becomes 'brit' (I've seen this before).
'ahead of' says to put letters next to each other (some letters go in front of others).
'a larger number' becomes 'en' (I can't explain this - if you can you should give a lot more credence to this answer).
The initial letter of 'the' is 't'.
't' after 'brit' is 'britt'.
'britt'+'en'='BRITTEN'
Can you help me to learn more?
(Other definitions for britten that I've seen before include "Benjamin -, twentieth century English composer (" , "Composer born 1913" , "See 8" , "Billy Budd composer" , "Composer of Peter Grimes" .)