Fly with parent, having extended parts of journey? (5-8)
I believe the answer is:
daddy-longlegs
'fly' is the definition.
(I've seen this before)
'parent having extended parts of journey?' is the wordplay.
'parent' becomes 'daddy' (daddy is a kind of parent).
'having' means one lot of letters go next to another.
'extended' becomes 'long' (extended can mean longer than usual).
'parts of journey?' becomes 'legs' (leg can mean a part of a journey).
'daddy'+'long'+'legs'='DADDY-LONGLEGS'
'with' acts as a link.
(Other definitions for daddy-longlegs that I've seen before include "Crane fly" , "Cranefly" .)