Row when dog bites the Queen (7)
I believe the answer is:
terrace
'row' is the definition.
(thesaurus)
'dog bites the queen' is the wordplay.
'dog' becomes 'trace' (tracing is a kind of dogging**).
'bites' means one lot of letters goes inside another.
'the queen' becomes 'er' (Elizabeth Regina).
'trace' placed around 'er' is 'TERRACE'.
'when' is the link.
(Other definitions for terrace that I've seen before include "Stadium's standing area" , "Paved area by building" , "Row of attached houses" , "Bank - houses in a row" , "Row of usually identical and connected houses" .)