It may be above a keeper's head (3)
I believe the answer is:
bar
This could be a double definition.
'it may be above' is the first definition.
The definition suggests a singular noun which matches the answer.
'a keeper's head' is the second definition.
The definition and answer can be both acts as well as being singular nouns.
Maybe they are linked in a way I don't understand?
Can you help me to learn more?
(Other definitions for bar that I've seen before include "Drinking place - lawyers!" , "Unit of music" , "Save; pub" , "Exclude; sandbank" , "Obstacle" .)