Some football players may be so agile (7)
I believe the answer is:
goalies
'some football players' is the definition.
The answer and definition can be both people as well as being plural nouns.
Perhaps they are linked in a way I don't understand?
'may be so agile' is the wordplay.
'may be' indicates an anagram.
'so'+'agile'='soagile'
'soagile' anagrammed gives 'GOALIES'.
Can you help me to learn more?
(Other definitions for goalies that I've seen before include "They defend the net" , "Footballers" , "defence people" , "Keepers of nets - so agile" .)