Picture of timber (7)
I believe the answer is:
woodcut
I believe this is a double definition.
'picture' is the first definition.
(type of illustration made from a woodblock print)
'timber' is the second definition.
(timber is wood from cut down trees)
'of' acts as a link.
(Other definitions for woodcut that I've seen before include "Print made from an engraved block" , "Impression" , "Engraving" , "Old book illustration" , "(Print from) incised block" .)