Weep and go back - nice arrangement at very low temperatures (9)
I believe the answer is:
cryogenic
'at very low temperatures' is the definition.
I can't tell whether this defines the answer.
'weep and go back nice arrangement' is the wordplay.
'weep' becomes 'cry' (synonyms).
'and' is a charade indicator (letters next to each other).
'back' says the letters should be written in reverse.
'arrangement' is an anagram indicator.
'go' backwards is 'og'.
'nice' is an anagram of 'enic'.
'cry'+'og'+'enic'='CRYOGENIC'
Can you help me to learn more?
(Another definition for cryogenic that I've seen is " Concerned with creating ultra-low temperatures".)