Rather dry month including odd times temperature drops (4-3)
I believe the answer is:
demi-sec
'rather dry' is the definition.
I know nothing about this answer so I can't judge whether this works.
'month including odd times temperature drops' is the wordplay.
'month' becomes 'dec' (abbreviation for December).
'including' indicates putting letters inside.
'odd' is an anagram indicator.
'temperature' becomes 't' (abbreviation).
'drops' is a deletion indicator.
'times' with 't' taken out is 'imes'.
'imes' is an anagram of 'mise'.
'dec' placed around 'mise' is 'DEMI-SEC'.
Can you help me to learn more?
(Other definitions for demi-sec that I've seen before include "(Of wine) medium dry" , "Medium-sweet" .)