Doesn't let one forget about and is disturbed by (7)

'doesn't let one forget about and is disturbed by' is the definition.
I can't tell whether this definition defines the answer.

'let one forget about and is disturbed by' is the wordplay.
'let one' becomes 'rem' (I can't justify this - if you can you should give a lot more credence to this answer).
'forget' indicates named letters should be taken away.
'about' becomes 'a' (abbreviation in Chambers).
'disturbed by' means one lot of letters goes inside another (inserted letters disrupt or disturb the word).
'and' with 'a' taken away is 'nd'.
'nd' put inside 'is' is 'inds'.
'rem'+'inds'='REMINDS'

Can you help me to learn more?