### Clue: It was Tommy's protection which secured home (3,3)
### Answer: TIN HAT 
 ### Explanation: Definition: It was Tommy's protection
  THAT(an alternative to *which*, also to who, in grammatical construction) around(*secured*) IN(at *home*).  Defn:  Combat headgear,*protection* for *Tommy*, the representative name for a British Army private, Tommy Atkins in full.  The hat's actually made of steel.