Valuable property (5)
(Other definitions for primer that I've seen before include "First coat - book" , "Elementary text book" , "device for detonating charge" , "Initial coat of paint" , "Basic teaching book" .)
(Other definitions for asset that I've seen before include "Valuable possession, worth having" , "Useful item" , "Anything considered valuable" , "Valued item" , "Plus point" .)