Appear to see satisfactorily (4)
I believe the answer is:
look
'appear' is the definition.
(I know that appear can be written as look)
'see satisfactorily' is the wordplay.
'see' becomes 'lo' ('lo' is an archaic exclamation meaning 'look!').
'satisfactorily' becomes 'O.K.' (synonyms).
'lo'+'ok'='LOOK'
'to' acts as a link.
(Other definitions for look that I've seen before include "Behold" , "Seem" , "Search (with the eyes)" , "Cockney butcher's" , "Direct the eye to" .)