Clear solution we later amended, I am to put in (9)

I believe the answer is:

limewater

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'clear solution' is the definition.
'limewater' can be an answer for 'solution' (I've seen this before). I am unsure of the 'clear' bit.

'we later amended i am to put in' is the wordplay.
'amended' indicates an anagram.
'i am' becomes 'I'm'.
'to put in' means one lot of letters goes inside another.
'we'+'later'='welater'
'welater' is an anagram of 'lewater'.
'lewater' enclosing 'im' is 'LIMEWATER'.

Can you help me to learn more?

(Another definition for limewater that I've seen is " solution".)

I've seen this clue in The Telegraph.

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