Red Prince regularly seen in something like 'War and Peace' (4)
I believe the answer is:
epic
'in something like war and peace' is the definition.
I can't judge whether this defines the answer.
'red prince regularly' is the wordplay.
'regularly' indicates alternate letters (regularly take one letter, leave next etc.).
'red'+'prince'='redprince'
The alternate letters of 'redprince' are 'EPIC'.
'seen' acts as a link.
Can you help me to learn more?
(Other definitions for epic that I've seen before include "On a grand scale, like heroic poem" , "Large in scale" , "Long poem set in nice picture" , "Of heroic proportions" , "Long poem, book, film" .)