Written or mental reminder (4)
I believe the answer is:
note
(Other definitions for note that I've seen before include "Short message; piano key" , "Do, re or mi?" , "Write down" , "Observe the musical pitch." , "Single tone; short letter" .)
I believe the answer is:
note
(Other definitions for note that I've seen before include "Short message; piano key" , "Do, re or mi?" , "Write down" , "Observe the musical pitch." , "Single tone; short letter" .)