Mostly long drinks in all seasons (4,5)
I believe the answer is:
year round
'mostly long drinks in all seasons' is the definition.
I can't tell whether this definition defines the answer.
'mostly long drinks' is the wordplay.
'mostly' means to remove the last letter.
'long' becomes 'yearn' (synonyms).
'drinks' becomes 'round' (I've seen this before).
'yearn' with its last letter taken off is 'year'.
'year'+'round'='YEAR-ROUND'
Can you help me to learn more?
(Another definition for year round that I've seen is " every season".)