Keepers of ideally clean sheets (7)
I believe the answer is:
goalies
'keepers' is the definition.
(I know this)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for goalies that I've seen before include "Keepers of nets - so agile" , "Footballers" , "defence people" , "They defend the net" .)