Retire and - never mind university - somehow opens pharmacy (4,2,4,5)

'pharmacy' is the definition.
I know nothing about this answer so I can't tell whether it can be defined by this definition.

'retire and never mind university somehow opens' is the wordplay.
I cannot quite understand how this works, but
'and' could be 'n' (common abbreviation for 'and') and 'n' is found in the answer.
'university' could be 'u' (abbreviation for university) and 'u' is found within the answer.
an anagram of 'opens' is 'pones' which is located in the answer.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?