Conceive; suppose (7)
I believe the answer is:
imagine
I believe this clue is a double definition.
'conceive' is the first definition.
(I've seen this before)
'suppose' is the second definition.
(I know that suppose can be written as imagine)
(Other definitions for imagine that I've seen before include "Picture in mind, envisage" , "Fancy - dream" , "Picture to oneself" , "Picture in one's mind" , "Conceive in the mind" .)