Large furniture shop's popular very quickly (4,1,4)
I believe the answer is:
like a shot
'very quickly' is the definition.
I don't know anything about this answer so I can't tell whether it can be defined by this definition.
'large furniture shop's popular' is the wordplay.
'large' becomes 'l'.
'furniture shop' becomes 'ikeas' (I can't explain this - if you can you should give a lot more credence to this answer).
'popular' becomes 'hot' (similar in meaning).
'l'+'ikeas'+'hot'='LIKE A SHOT'
Can you help me to learn more?
(Other definitions for like a shot that I've seen before include "What tequila drinkers might do" , "enthusiastically?" , "Enjoy a wee dram" , "What spirit drinkers do" , "What serious drinkers do" .)