1 April - Solution for the last clue and the next cryptic crossword clue

Model, keeping one's balance (5)

Solution – poise

Model = pose

Keeping one – means I for one is found inside "Pose", making poise ie balance

Today’s cryptic crossword clue – solution tomorrow

Excavate part of chateau near there (7)

Source of clue – NZ Herald

Hint – look for the hidden word