A shade upset about the poor start, got into form (6)
I believe the answer is:
shaped
'into form' is the definition.
I can't judge whether this definition defines the answer.
'a shade upset about the poor start' is the wordplay.
'upset' indicates an anagram.
'about' indicates putting letters inside.
'start' indicates taking the first letters.
The initial letter of 'poor' is 'p'.
'shade' is an anagram of 'shaed'.
'shaed' placed around 'p' is 'SHAPED'.
'got' acts as a link.
Can you help me to learn more?
(Other definitions for shaped that I've seen before include "Form-filling" , "Cast or moulded" , "Gave form to" , "Moulded, wrought" , "Given a certain form - phased accordingly" .)