Insured person’s decision-making basis with husband not so young (6-6)

I believe the answer is:

policy-holder

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'insured person's decision-making' is the definition.
I know nothing about this answer so I cannot tell whether it can be defined by this definition.

'basis with husband not so young' is the wordplay.
'basis with' becomes 'policy' (I can't justify this - if you can you should believe this answer much more).
'husband' becomes 'h' (abbreviation).
'not so young' becomes 'older' ('old' can be the opposite of 'young' so perhaps 'older' is reasonable for 'not so young').
'policy'+'h'+'older'='POLICY-HOLDER'

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