A delight for some? Thirty kegs, and free! (3,3,2,5)
I believe the answer is:
red sky at night
'a delight for some?' is the definition.
(as in 'red sky at night - shepherd's delight')
'thirty kegs and free' is the wordplay.
'free' indicates anagramming the letters.
'thirty'+'kegs'+'and'='thirtykegsand'
'thirtykegsand' with letters rearranged gives 'RED SKY AT NIGHT'.
(Other definitions for red sky at night that I've seen before include "Shepherd's delight" , "sign of good things on the morrow?" .)