Indicates it's a recurring problem, seeing woman's sheep leave once more (4,2,2,5)
I believe the answer is:
here we go again
'indicates it's a recurring problem' is the definition.
I know nothing about this answer so I can't judge whether this works.
'woman's sheep leave once more' is the wordplay.
'woman's' becomes 'her' (belonging to a woman).
'sheep' becomes 'ewe' (a ewe is a female sheep).
'leave' becomes 'go' (to go is to depart or leave).
'once more' becomes 'again' (synonyms).
'her'+'ewe'+'go'+'again'='HERE WE GO AGAIN'
'seeing' acts as a link.
Can you help me to learn more?
(Other definitions for here we go again that I've seen before include "The same undesirable things are happening" , "The same situation is recurring" , "Leaving for our regular holiday" , "how boring" , "The same thing is reoccurring! (colloq.)" .)