My chela developed medieval science? (7)
I believe the answer is:
alchemy
'medieval science?' is the definition.
'alchemy' can be an answer for 'science?' (I have seen 'old science' mean 'alchemy' so perhaps 'science' could also mean 'alchemy'). I am not sure about the 'medieval' bit.
'my chela developed' is the wordplay.
'developed' indicates an anagram.
'my'+'chela'='mychela'
'mychela' with letters rearranged gives 'ALCHEMY'.
Can you help me to learn more?
(Other definitions for alchemy that I've seen before include "Pre-scientific chemistry" , "Black art" , "Attempt at transformation" , "Forerunner of eleven ac" , "Medieval activity to turn base metal into gold" .)