Some baseball players look for no backing (7)
I believe the answer is:
yankees
'some baseball players' is the definition.
The definition and answer can be both people as well as being plural nouns.
Maybe you can see an association between them that I can't see?
'look for no backing' is the wordplay.
'look for' becomes 'seek' (synonyms).
'no' becomes 'nay' (archaic form 'no').
'backing' says the letters should be written backwards.
'seek'+'nay'='seeknay'
'seeknay' in reverse letter order is 'YANKEES'.
Can you help me to learn more?
(Other definitions for yankees that I've seen before include "Side in US Civil War" , "Union troops" , "multiple bets" , "Code words on the radio for US" , "New York baseball team" .)