You'll find that in bunker golf gets played more slowly (4)
I believe the answer is:
grit
'you'll find that in bunker' is the definition.
The definition suggests a singular noun which matches the answer.
'golf gets played more slowly' is the wordplay.
'golf' becomes 'g' (phonetic alphabet: alpha, bravo, charlie etc.).
'gets' is a charade indicator (letters next to each other).
'played more slowly' becomes 'rit' (I can't explain this - if you can you should believe this answer much more).
'g'+'rit'='GRIT'
Can you help me to learn more?
(Other definitions for grit that I've seen before include "Courage (needed by chickens?)" , "True determination?" , "Courage; tiny stones" , "Particles of stone/sand" , "Fragments to sprinkle on roads" .)