In total, it has its warmer side (6)

I believe the answer is:
summer
'warmer side' is the definition.
Both the answer and definition are adjectives. Maybe they are linked in a way I don't understand?
'in total it has its' is the wordplay.
I cannot quite see how this works, but
'total' could be 'sum' (synonyms) and 'sum' is located in the answer.
'it' could be 'e' ('e' can mean 'electronic' which is similar to 'IT') and 'e' is located in the answer.
The remaining letters 'mr' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for summer that I've seen before include "Would one count" , "could be described as Indian" , "'. . . . . . time an' the livin' is easy' (song)" , "Best of times" , "Adder" .)
