In total, it has its warmer side (6)
I believe the answer is:
summer
'warmer side' is the definition.
Both the definition and answer are adjectives. Perhaps you can see a link between them that I can't see?
'in total it has its' is the wordplay.
I cannot quite see how this works, but
'total' could be 'sum' (synonyms) and 'sum' is found in the answer.
'it' could be 'e' ('e' can mean 'electronic' which is similar to 'IT') and 'e' is present 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" .)