Upset after woman rising to increase temperature again (6)
I believe the answer is:
reheat
'increase temperature again' is the definition.
'upset after woman rising' is the wordplay.
'upset' becomes 'eat' (eat can mean to upset or distress).
'after' says to put letters next to each other.
'woman' becomes 'her' (**).
'rising' shows that the letters should be reversed in order (going up in a down clue).
'her' written backwards gives 'reh'.
'eat' put after 'reh' is 'REHEAT'.
'to' is the link.
(Other definitions for reheat that I've seen before include "Method of getting extra power from jet engine" , "Bring back to the boil, for instance" , "Warm (food) up again" , "Of cooked food, give another go in the microwave" , "Cook again" .)