Fan (10)
'fan' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for ventilator that I've seen before include "apparatus to assist breathing" , "breather" , "Device to help breathing" , "Fan" , "Respirator" .)
'fan' is the definition.
(an admirer is a fan of something)
This is all the clue.
(Other definitions for admirer that I've seen before include "Romantic adorer" , "sweetheart" , "Suitor; devotee" , "Fan or devotee" , "Married to suitor" .)
'fan' is the definition.
(I know that fan can be written as devotee)
This is all the clue.
(Other definitions for devotee that I've seen before include "dedicated person" , "A very loyal or loving person" , "Keen admirer" , "One strongly interested in something" , "Disciple" .)
'fan' is the definition.
(eg a fan of a football team)
This is the entire clue.
(Other definitions for supporter that I've seen before include "Fan; heraldic figure" , "One cheers" , "Advocate" , "One helping" , "sports fan?" .)