[ape] See: [GO APE].

[appear] See: [SPEAK OF THE DEVIL AND HE APPEARS].

[appearance] See: [PUT IN AN APPEARANCE] also [MAKE AN APPEARANCE].

[apple] See: [POLISH THE APPLE].

[apple of one's eye] {n. phr.} Something or someone that is […]

[apple polisher]; [apple polishing] See: [POLISH THE APPLE].

[apple-pie order] {n. phr.}, {informal} Exact orderly arrangement, neatness; tidy arrangement. […]

[applecart] See: [UPSET THE APPLECART] or [UPSET ONE'S APPLECART].

[approval] See: [ON APPROVAL].

[apron] See: [TIED TO ONE'S MOTHER'S APRON STRINGS].