Crossword Genius

Like subscribers, not meant to receive rebates initially (11)

Ross

I believe the answer is:

undersigned

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'like subscribers not meant to receive rebates initially' is the definition.
I can't tell whether this definition defines the answer.

'not meant to receive rebates initially' is the wordplay.
'not' becomes 'un' (prefix meaning 'not').
'meant' becomes 'designed' (I've seen this before).
'to receive' means one lot of letters goes inside another.
'rebates initially' becomes 'r' (I can't justify this - if you can you should give a lot more credence to this answer).
'designed' enclosing 'r' is 'dersigned'.
'un'+'dersigned'='UNDERSIGNED'

Can you help me to learn more?

(Other definitions for undersigned that I've seen before include "Person authorising this document" , "Subscriber" .)

I've seen this clue in The Times.
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