Dog, as it happens, getting back on couch (7)
I believe the answer is:
bedevil
'dog' is the definition.
(I've seen this before)
'as it happens getting back on couch' is the wordplay.
'as it happens' becomes 'live' (as in live television).
'getting back' is a reversal indicator.
'on' is a charade indicator (letters next to each other).
'couch' becomes 'bed' (I've seen this before).
'live' in reverse letter order is 'evil'.
'evil' put after 'bed' is 'BEDEVIL'.
(Other definitions for bedevil that I've seen before include "Throw into confusion" , "Torture" , "Cause problems for" , "Worry, harass" , "Afflict" .)