Indefatigable keeper? (6)
I believe the answer is:
stayer
'indefatigable keeper?' is the definition.
Although both the answer and definition are singular nouns, I can't understand how one could define the other.
This is the entire clue.
Can you help me to learn more?
(Other definitions for stayer that I've seen before include "One with lasting qualities" , "one running over a long distance?" , "Racehorse perhaps" , "person hanging on" , "Person who lasts the course, doesn't quit" .)