Head of Science perhaps has Group T rebelling about compositions (10)
I believe the answer is:
essayettes
'head of science' is the definition.
I know nothing about this answer so I can't tell whether it can be defined by this definition.
'perhaps has group t rebelling about compositions' is the wordplay.
I cannot quite see how this works, but
'perhaps' could be 'y' (I've seen this in other clues) and 'y' is located in the answer.
't' is found in the answer.
'about' could be 'a' (abbreviation in Chambers) and 'a' is present in the answer.
'group' could be 'set' (both can mean a collection) and 'set' is present in the leftover letters.
This explanation may well be incorrect...
Can you help me to learn more?