Conjunction (3)
'conjunction' is the definition.
('and' is a conjunction)
This is all the clue.
(Other definitions for and that I've seen before include "Joiner or dandies" , "Also" , "Most-used conjunction in English" , "It's used to connect words, clauses or sentences" , "Joining word" .)
'conjunction' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for union that I've seen before include "Marriage; pipe joint" , "mating" , "junction" , "Group who may want better conditions" , "Agreement -- wedlock" .)