Pressure to design and match outfit (8)
I believe the answer is:
playsuit
'outfit' is the definition.
(I know that playsuit is a type of outfit)
'pressure to design and match' is the wordplay.
I cannot really understand how this works, but
'pressure' could be 'p' (scientific abbreviation) and 'p' is present in the answer.
'match' could be 'suit' (suiting is a kind of matching) and 'suit' is located in the answer.
The remaining letters 'lay' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for playsuit that I've seen before include "Baby's onesie" , "Baby's garment" .)