Turn round exasperated at first after fellow left without you (7)
I believe the answer is:
flexure
'turn' is the definition.
(thesaurus)
'exasperated at first after fellow left without you' is the wordplay.
I cannot really see how this works, but
'fellow' could be 'f' (abbreviation - of a society etc.) and 'f' is found within the answer.
'left' could be 'l' (common abbreviation) and 'l' is found in the answer.
'without' could be 'ex' (Latin) and 'ex' is located in the answer.
'you' could be 'u' (homophones) and 'u' is found within the answer.
The remaining letters 're' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
'round' acts as a link.
Can you help me to learn more?
(Other definitions for flexure that I've seen before include "A bend" , "Action of bending" , "Act of bending a joint" .)