CCCWC August competition voters’ comments on Clue no. 22

A clue to OXHEAD.
2 comments refer to this clue (from 2 competitors, 0 others)

Here is the text

Comments on the clue

1.	'essentially' to show hidden but not in the centre doesn't work so well
2.	'Essentially' is one of those indicator words that often spoils a good clue