British soldier (5)
'british soldier' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for tommy that I've seen before include "Private soldier (slang)" , "Doubtful apostle could be so familiar" , "British soldier (informal)" , "Bread" , "Private in the Army - kind of gun" .)
(Other definitions for redcoat that I've seen before include "British soldier in the American War of Independence" , "Do react (anag) - old soldier" , "British soldier or Butlin's worker" , "Tommy, once" , "Old British soldier - Butlin's entertainment organiser" .)