Force queen into seedy bar (5)
I believe the answer is:
drive
'force' is the definition.
(driving is a kind of forcing)
'queen into seedy bar' is the wordplay.
'queen' becomes 'r' (r is abbreviation regina. e.g. in ER ).
'into' indicates putting letters inside.
'seedy bar' becomes 'dive' (I've seen this before**).
'r' inserted inside 'dive' is 'DRIVE'.
(Other definitions for drive that I've seen before include "computer store" , "offensive" , "tenacity" , "gear" , "zip" .)