Father flipped paintings separately (5)
I believe the answer is:
apart
'separately' is the definition.
(I've seen this in another clue)
'father flipped paintings' is the wordplay.
'father' becomes 'pa' (pa can mean dad or father).
'flipped' says the letters should be written backwards.
'paintings' becomes 'art' (painting is a type of artwork).
'pa' written backwards gives 'ap'.
'ap'+'art'='APART'
(Other definitions for apart that I've seen before include "Separated physically" , "Separate in a trap" , "Unconnected" , "Separated or at a distance" , "Independently" .)