All-in total (5)
I believe the answer is:
tally
'all-in total' is the definition.
'tally' can be an answer for 'total' (thesaurus). I'm not sure about the 'all-in' bit.
'all-in total' is the wordplay.
'in' indicates putting letters inside.
'total' becomes 'ty' (I am not sure about this - if you are sure you should believe this answer much more).
'all' put into 'ty' is 'TALLY'.
Can you help me to learn more?
(Other definitions for tally that I've seen before include "Square" , "Record; current score" , "Agree - count" , "Score; correspond" , "Current score; agree" .)