Artist starts to date all Lowry's images (4)
I believe the answer is:
dali
'artist' is the definition.
(Salvador Dali)
'starts to date all lowry's images' is the wordplay.
'starts to' indicates taking the first letters.
The first letters of 'date all lowry images' is 'DALI'.
(Other definitions for dali that I've seen before include "Controversial painter" , "Surrealist Spanish painter, d. 1989" , "Salvador . . . . was great Spanish surrealist painter" , "Salvador --, twentieth century Spanish surrealist painter" , "Salvador among artists" .)