Developed in the wrong way (5)
I believe the answer is:
grown
'developed' is the definition.
(I've seen this before)
'wrong way' is the wordplay.
'way' indicates an anagram (another way of arranging the letters).
'wrong' anagrammed gives 'GROWN'.
'in the' acts as a link.
(Other definitions for grown that I've seen before include "Big" , "Mature; raised" , "Increased; raised" , "Matured" , "Increased; developed" .)