After first day off insensitive student body withdraws ice cream (6)
I believe the answer is:
sundae
'ice cream' is the definition.
(sundae is a type of ice cream)
'after first day off insensitive student body withdraws' is the wordplay.
I cannot quite see how this works, but
'first' could be 'a' (first letter of the alphabet) and 'a' is located in the answer.
'day' could be 'sun' (abbreviation for Sunday) and 'sun' is present in the answer.
The remaining letters 'de' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for sundae that I've seen before include "Ice-cream/nut etc. dish" , "Ice cream confection sounding sabbatical" , "Type of dessert" , "Ice cream served with fruit and syrup" , "Sweet" .)