Tiny label read out by setter's too much (9)
I believe the answer is:
excessive
'tiny label read' is the definition.
Both the definition and answer are adjectives. Perhaps they are linked in a way I don't understand?
'by setter's too much' is the wordplay.
'by' means one lot of letters go next to another.
'setter's' becomes 'ive' ('I've', referring to the crossword setter).
'too much' becomes 'excess' (excess of something means too much of it).
'ive' put after 'excess' is 'EXCESSIVE'.
'out' acts as a link.
Can you help me to learn more?
(Other definitions for excessive that I've seen before include "Over the top" , "More than is desirable" , "Disproportionate" , "Immoderate" , "Inordinate, unreasonable" .)