Progressive splitting outside in-patient lavatory? (7-7)

I believe the answer is:

forward-looking

I'm a little stuck... Click here to teach me more about this clue!

'progressive' is the definition.
(I've seen this before)

'splitting outside in-patient lavatory?' is the wordplay.
I cannot quite understand how this works, but
'in' is present in the answer.
'lavatory?' could be 'loo' (loo is a kind of lavatory) and 'loo' is located in the answer.
This explanation may well be incorrect...

Can you help me to learn more?

I've seen this clue in The Independent.

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