Steps required for returning chimney in Glasgow area (7)
I believe the answer is:
formula
'steps' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.
'returning chimney in glasgow area' is the wordplay.
'returning' says the letters should be written in reverse.
'chimney' becomes 'lum' (Scottish word for a chimney).
'in' means one lot of letters goes inside another.
'glasgow area' becomes 'fora' (I am not sure about this - if you are sure you should believe this answer much more).
'lum' back-to-front is 'mul'.
'mul' put inside 'fora' is 'FORMULA'.
'required for' acts as a link.
Can you help me to learn more?
(Other definitions for formula that I've seen before include "One that's on track" , "powdered milk for babies" , "Mathamatical expression" , "Set expression" , "Baby food" .)