CCCWC April competition voters’ comments on Clue no. 24

A clue to CORVUS.
3 comments refer to this clue (from 3 competitors, 0 others)

Here is the text

Comments on the clue

1.	Not sure "held in Mexico resolve " helps identify COR. Could be CORE or CORES as well.
2.	Indication for COR is unfair to solvers
3.	Part of a word cannot be hidden unless its specific position is indicated.