One dictated to a football team measures one’s put together (10)
I believe the answer is:
amanuensis
'one dictated to' is the definition.
(type of assistant who writes)
'a football team measures one's put together' is the wordplay.
'football team' becomes 'manu' (short for Manchester United).
'measures' becomes 'ens' (en is a kind of measure**).
'one's' becomes 'is' (Roman numeral).
'put together' is a charade indicator (letters next to each other).
'a'+'manu'+'ens'+'is'='AMANUENSIS'
(Other definitions for amanuensis that I've seen before include "dictator's collaborator, perhaps" , "secretarial post" , "Literary assistant - scribe" , "PA" , "Secretary" .)