Design phase botched (5)
I believe the answer is:
shape
'design' is the definition.
(thesaurus)
'phase botched' is the wordplay.
'botched' is an anagram indicator.
'phase' anagrammed gives 'SHAPE'.
(Other definitions for shape that I've seen before include "Form, figure" , "Heaps (anag.)" , "Good physical form" , "'Figure, outline (5)'" , "Form; mould" .)