Positive reaction from Spain that's binding in a part of Egypt (5)
I believe the answer is:
sinai
'part of egypt' is the definition.
(I know that Sinai is part of Sinai Peninsula)
'positive reaction from spain that's binding in a' is the wordplay.
I cannot really understand how this works, but
'from' could be 'in' (I've seen this in other clues) and 'in' is found within the answer.
'a' is present in the answer.
The remaining letters 'si' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for sinai that I've seen before include "One showing genetic change" , "Mountainous peninsula in Egypt" , "Biblical mount" , "11 Across peninsula" , "Law handed down here" .)