To close down, I see, in a fuel industry, has its point (7)
I believe the answer is:
conical
'to close down i' is the definition.
I can't tell whether this defines the answer.
'in a fuel industry has its point' is the wordplay.
'in' means one lot of letters goes inside another.
'a fuel' becomes 'coal' (coal is a kind of fuel).
'industry' becomes 'nc' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'has' indicates putting letters inside.
'point' suggests taking the first letters (an end or point of the word).
The initial letter of 'its' is 'i'.
'nc' enclosing 'i' is 'nic'.
'coal' going around 'nic' is 'CONICAL'.
'see' is the link.
Can you help me to learn more?
(Other definitions for conical that I've seen before include "Shaped like a witch's hat" , "Classic shape of volcano" , "Pointed" , "Shaped like volcano peak" , "Like a wizard's hat" .)