2 runs to board boat in picture? (7)
I believe the answer is:
artwork
'picture?' is the definition.
(picture is a kind of artwork)
'2 runs to board boat' is the wordplay.
'r' becomes 'two' ('two' can be a synonym of 'r').
'runs' becomes 'r' (cricket abbreviation).
'to board' means one lot of letters goes inside another.
'boat' becomes 'ark' (ark is a kind of boat**).
'two'+'r'='twor'
'twor' going into 'ark' is 'ARTWORK'.
'in' is the link.
(Other definitions for artwork that I've seen before include "Illustrations prepared for a publication" , "Illustrations in book" , "Graphics" , "Illustrations and designs for printing" , "Illustrative material in publication" .)