Show part of the promenade pictorially (6)
I believe the answer is:
depict
'show' is the definition.
(to depict is to show or portray)
'part of the promenade pictorially' is the wordplay.
'part of' indicates a hidden word.
'DEPICT' can be found hidden inside 'promenade pictorially'.
(Other definitions for depict that I've seen before include "Show, illustrate" , "Give a description of" , "Draw, describe" , "Make a likeness of" , "Show in form of picture, or describe in words" .)