Customer possibly in view (8)
I believe the answer is:
prospect
I believe this is a double definition.
'customer' is the first definition.
(I have seen 'Potential customer ' mean 'prospect' so perhaps 'customer' could also mean 'prospect')
'in view' is the second definition.
(thesaurus)
'possibly' is the link.
(Other definitions for prospect that I've seen before include "Search for mineral deposits - possibility" , "Survey the outlook" , "View - outlook" , "Someone who might buy" , "Chance of success" .)