To flog ice-cream without containers requires a certain sort of reasoning (5)
I believe the answer is:
logic
'reasoning' is the definition.
(I've seen this before)
'to flog ice-cream without containers requires a certain sort' is the wordplay.
'LOGIC' is hidden within the letters.
However, I'm uncertain how this is indicated.
'of' is the link.
Can you help me to learn more?
(Other definitions for logic that I've seen before include "Reasonable judgement" , "Rational thinking" , "Sound sense" , "Strict reasoning" , "4-ing" .)