Crossword Genius

Region's average temperature (4)

Ross

I believe the answer is:

part

'region's' is the definition.
('part' can be a synonym of 'region')

'average temperature' is the wordplay.
'average' becomes 'par' (I've seen this before).
'temperature' becomes 't' (abbreviation).
'par'+'t'='PART'

(Other definitions for part that I've seen before include "Piece; divide" , "Sever; portion" , "Constituent - something to play?" , "Section of a whole" , "unemployed actor hopes for" .)

I've seen this clue in The Telegraph.
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