What does the cryptic crossword clue "Construction expert memorialised Scottish war hero (7)" mean?

The definition is "hero". The wordplay uses a charade (building blocks). WALL (synonym="WALL") + ACE (synonym="ACE") = WALLACE The answer is WALLACE.

Construction expert memorialised Scottish war hero (7)

Independent Cryptic #11866 | 19 Down | 2024-10-21 flower