Singing with spirit (3)
I believe the answer is:
gin
'spirit' is the definition.
(alcoholic spirit)
'singing with' is the wordplay.
'with' indicates a hidden word.
'GIN' is hidden within 'singing'.
(Other definitions for gin that I've seen before include "Spirit; cotton machine" , "Liquor flavoured with juniper berries" , "Clear alcoholic drink" , "Trap for catching animals" , "Spirit, aka 'Mother's ruin'" .)