Making water with iodine in primitive land (9)

I believe the answer is:

urination

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'making water' is the definition.
'urination' can be an answer for 'water' (thesaurus). I'm unsure of the 'making' bit.

'iodine in primitive land' is the wordplay.
'iodine' becomes 'I' (chemical symbol).
'in' indicates putting letters inside.
'primitive' becomes 'ur' (prefix meaning the earliest or original).
'land' becomes 'nation' (synonyms).
'ur'+'nation'='urnation'
'i' put inside 'urnation' is 'URINATION'.

'with' is the link.

Can you help me to learn more?

I've seen this clue in The Times.

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