Gather writers sister is hosting old crew, for example (10,4)
I believe the answer is:
collective noun
'crew for example' is the definition.
The definition suggests a singular noun which matches the answer.
'gather writers sister is hosting old' is the wordplay.
I cannot really understand how this works, but
'gather' could be 'collect' (synonyms) and 'collect' is located in the answer.
'old' could be 'o' (common abbreviation eg in OE for Old English) and 'o' is found within the answer.
'sister' could be 'nun' (sister is a term of address for a nun) and 'nun' is found within the leftover letters.
The remaining letters 'ive' 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 collective noun that I've seen before include "exaltation for one" , "assembly, for example" .)