Joiner featured in a Shakespeare play, though not much at the start (3)
I believe the answer is:
and
'joiner' is the definition.
('and' joins words together)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for and that I've seen before include "it needs wholly positive input for positive result" , "A very common conjunction" , "It's used to connect words, clauses or sentences" , "Together with" , "Joiner or dandies" .)