Mongrel, angry, runs into couch (9)

I believe the answer is:

crossbred

'mongrel' is the definition.
(similar in meaning)

'angry runs into couch' is the wordplay.
'angry' becomes 'cross' (I've seen this before).
'runs' becomes 'r' (cricket abbreviation).
'into' means one lot of letters goes inside another.
'couch' becomes 'bed' (I've seen this before).
'r' going within 'bed' is 'bred'.
'cross'+'bred'='CROSSBRED'

(Another definition for crossbred that I've seen is " Hybridised".)

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