Im taking a long time to make this representation (5)
I believe the answer is:
image
'this representation' is the definition.
(image is a kind of representation)
'im taking a long time' is the wordplay.
'taking' means one lot of letters go next to another.
'a long time' becomes 'age' (an age is a period of time).
'im'+'age'='IMAGE'
'to make' acts as a link.
(Other definitions for image that I've seen before include "Iconic representation" , "Picture; simile" , "Simulacrum" , "Vision" , "Likeness; metaphor" .)