Drink with a teetotaller out of love (3)
I believe the answer is:
tot
'drink' is the definition.
(I've seen this before)
'a teetotaller out of love' is the wordplay.
'a teetotaller' becomes 'tt' (abbreviation).
'out of' means one lot of letters goes inside another.
'love' becomes 'o' (In tennis, 'love' means 'zero').
'tt' going around 'o' is 'TOT'.
'with' acts as a link.
(Other definitions for tot that I've seen before include "Calculate" , "Small drink; accumulate" , "Small drink - young child" , "Get the sum for the toddler" , "Small amount of spirits" .)