Set thermostat right away to maximum (2,3,4)
I believe the answer is:
at the most
'to maximum' is the definition.
I can't tell whether this defines the answer.
'set thermostat right away' is the wordplay.
'set' indicates an anagram (instruction to set the letters).
'right' becomes 'r' (common abbreviation).
'away' is a deletion indicator.
'thermostat' with 'r' removed is 'themostat'.
'themostat' with letters rearranged gives 'AT THE MOST'.
Can you help me to learn more?
(Other definitions for at the most that I've seen before include "To the maximum level" , "Tops" .)