Bishop perhaps protects person whose progress involves one member (6)
I believe the answer is:
hopper
'person whose progress involves one member' is the definition.
I can't tell whether this defines the answer.
'bishop perhaps protects' is the wordplay.
'protects' says the answer is hidden in the clue (I've seen 'protecting' mean this).
'HOPPER' is hidden within 'bishop perhaps'.
Can you help me to learn more?
(Other definitions for hopper that I've seen before include "US painter" , "Insect that jumps, maybe on grass" , "What brings grist to the mill?" , "Carrier on farm" , "agricultural machine?" .)