Suit cut on the counter out of Crimplene is enormous (6)
I believe the answer is:
onesie
'suit cut on' is the definition.
I don't know anything about this answer so I cannot judge whether this works.
'counter out of crimplene is enormous' is the wordplay.
'counter' says the letters should be written backwards (counter can mean in the opposite direction).
'out of' says the answer is hidden in the clue.
'eiseno' can be found hidden inside 'crimplene is enormous'.
'eiseno' backwards is 'ONESIE'.
'the' is the link.
Can you help me to learn more?
(Other definitions for onesie that I've seen before include "Single-piece full body garment" , "One-piece full-body garment" .)