Just accepting hers being tweaked will perhaps cool things down? (5,3)
I believe the answer is:
fresh air
'perhaps cool things down?' is the definition.
I know nothing about this answer so I cannot tell whether it can be defined by this definition.
'just accepting hers being tweaked' is the wordplay.
'just' becomes 'fair' (just can mean fair in the sense of showing justice).
'accepting' is an insertion indicator (inserted letters are accepted).
'being tweaked' indicates anagramming the letters (I've seen this in other clues).
'hers' with letters rearranged gives 'resh'.
'fair' enclosing 'resh' is 'FRESH AIR'.
'will' acts as a link.
Can you help me to learn more?
(Other definitions for fresh air that I've seen before include "that's found outside" , "Type of fiend" .)