As Merton's type does in part, Hislop especially (6)
I believe the answer is:
slopes
'as merton's type does' is the definition.
I can't judge whether this definition defines the answer.
'part hislop especially' is the wordplay.
'part' indicates a hidden word.
'SLOPES' can be found hidden inside 'hislop especially'.
'in' acts as a link.
Can you help me to learn more?
(Other definitions for slopes that I've seen before include "Slanting surfaces" , "Of fairly great stature" , "Stretches of falling ground as for skiers" , "Gradients, inclines" , "Inclines, pitches" .)