The man loses every second drink (3)
I believe the answer is:
tea
'drink' is the definition.
(tea is a drink)
'the man loses every second' is the wordplay.
'man' becomes 'he' (pronoun for a man).
'loses' is a deletion indicator.
'every second' becomes 'ea' (I can't justify this - if you can you should give a lot more credence to this answer).
'the' with 'he' taken out is 't'.
't'+'ea'='TEA'
Can you help me to learn more?
(Other definitions for tea that I've seen before include "Afternoon or evening meal" , "Elevenses" , "tips for the cup?" , "Strangely, ate this drink" , "- - for Two (song)" .)