Young child, also cut, comes to (6)
I believe the answer is:
'comes to' is the definition.
('total' can be a synonym of 'come to')
'young child also cut' is the wordplay.
'young child' becomes 'tot' (tot can mean a baby or toddler).
'cut' means to remove the last letter.
'also' with its final letter taken away is 'als'.
(Other definitions for totals that I've seen before include "Kills" , "Adds up the entire amounts" , "Aggregations or sums" , "Sums and aggregates" .)