Summer month mostly with record for drink (5)
I believe the answer is:
julep
'for drink' is the definition.
(julep is a kind of drink)
'summer month mostly with record' is the wordplay.
'summer month' becomes 'july' (I've seen this before).
'mostly' means to remove the last letter (most but not all of the word).
'with' is a charade indicator (letters next to each other).
'record' becomes 'EP' (abbreviation for extended play record).
'july' with its final letter taken away is 'jul'.
'jul'+'ep'='JULEP'
(Other definitions for julep that I've seen before include "See 21 Down" , "Mint drink in America" , "(Minted) drink made with bourbon, sugar and crushed ice" , "Cocktail of bourbon, sugar and mint over crushed ice" , "Sweet drink, often medicated" .)