This is an anagram with a container - look for an indicator word that suggests rearranging letters, combined with one word being placed inside another.
"Up" is the anagram indicator - rearrange the letters of 'RISE' around the word for 'aged' (3 letters). The anagrammed letters go around the outside.
Answer: SOLDIER | 'Up' indicates anagram of RISE giving SIER, which captures/contains OLD (aged) to give S-OLD-IER = SOLDIER