The attendants give nothing away (7)
I believe the answer is:
keepers
'the attendants' is the definition.
The answer and definition can be both people as well as being plural nouns.
Perhaps you can see a link between them that I don't see?
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for keepers that I've seen before include "Custodians, stewards" , "Players in goal" , "Goalies" , "Zoo attendants" .)