I'm taking long time to produce picture (5)
I believe the answer is:
image
'picture' is the definition.
(synonyms)
'i'm taking long time' is the wordplay.
'taking' is a charade indicator (letters next to each other).
'long time' becomes 'age' (an age is a period of time).
'im'+'age'='IMAGE'
'to produce' acts as a link.
(Other definitions for image that I've seen before include "Likeness or mental picture" , "Photo or likeness" , "Idol; simile" , "Simulacrum" , "Metaphor; figure" .)