Puzzled about whiskey firm's budget (3-4)
I believe the answer is:
low-cost
'budget' is the definition.
(I've seen this in another clue)
'puzzled about whiskey firm's' is the wordplay.
'puzzled' becomes 'lot' (I am not sure about this - if you are sure you should believe this answer much more).
'about' is an insertion indicator.
'whiskey' becomes 'W' (phonetic alphabet: alpha, bravo, charlie etc.).
'firm's' becomes 'co's' (abbreviation for company).
'w'+'cos'='wcos'
'lot' going around 'wcos' is 'LOW-COST'.
Can you help me to learn more?
(Another definition for low-cost that I've seen is " Cheap".)