Quits all the same losing nothing (5)
I believe the answer is:
evens
'quits' is the definition.
(I've seen this before)
'all the same losing nothing' is the wordplay.
'all the same' becomes 'even so' (synonyms).
'losing' indicates named letters should be taken away.
'nothing' becomes 'o' (O resembles 0).
'evenso' with 'o' removed is 'EVENS'.
(Other definitions for evens that I've seen before include "decreases" , "50-50 chance" , "Levels - odds" , "Fifty-fifty odds" , "50-50 odds" .)