Like that hotel round Westminster area (4)
I believe the answer is:
soho
'westminster area' is the definition.
(I know that Soho is a geographic area)
'like that hotel round' is the wordplay.
'like that' becomes 'so' (as in 'like so').
'hotel' becomes 'h' (phonetic alphabet: alpha, bravo, charlie etc.).
'round' becomes 'o' (round can mean a round object).
'so'+'h'+'o'='SOHO'
(Other definitions for soho that I've seen before include "W London area" , "Smoke's part" , "Central London entertainment district" , "Colourful London show-biz district" , "Entertainment district in London's West End" .)