This is one angry expression! (9)
I believe the answer is:
crossword
'this is one' is the definition.
(this is a crossword)
'angry expression' is the wordplay.
'angry' becomes 'cross' (I've seen this before).
'expression' becomes 'word'.
'cross'+'word'='CROSSWORD'
(Other definitions for crossword that I've seen before include "this, appropriately" , "One of these, first published December 1913 ..." , "See 5" , "See 8, 20 ac, 1, 15 dn" , "Puzzle like this one" .)