And (4)
(Other definitions for yet that I've seen before include "Still; however" , "To this time, nevertheless" , "in spite of that" , "Up till now" , "'But, however (3)'" .)
'and' is the definition.
This is all the clue.
(Other definitions for plus that I've seen before include "And also; a bonus" , "Additional" , "being a little cross" , "Distant" , "To the French it's more" .)
'and' is the definition.
This is the entire clue.
(Other definitions for also that I've seen before include "into the bargain" , "in accompaniment" , "Plus" , "Likewise" , "an indication of more to come" .)