Note about husband supporting US city club (5)
I believe the answer is:
lathi
'club' is the definition.
(type of baton used in British India)
'note about husband supporting us city' is the wordplay.
'note' becomes 'ti' (musical note as in do re mi fa so la ti).
'about' means one lot of letters goes inside another.
'husband' becomes 'h'.
'supporting' means one lot of letters go next to another (in a down clue, some letters go below others).
'us city' becomes 'LA' (Los Angeles).
'ti' enclosing 'h' is 'thi'.
'thi' after 'la' is 'LATHI'.
(Other definitions for lathi that I've seen before include "club used by an Indian policeman" , "Long, heavy stick" , "Weapon police may use" , "Indian policeman's stick" , "club in India" .)