That chap with Harris? (5)
I believe the answer is:
lewis
'that chap with harris?' is the definition.
I can't judge whether this definition defines the answer.
'chap with harris?' is the wordplay.
'chap' becomes 'Lew'.
'with' says to put letters next to each other.
'harris?' becomes 'is' (I am not sure about this - if you are sure you should believe this answer much more).
'lew'+'is'='LEWIS'
Can you help me to learn more?
(Other definitions for lewis that I've seen before include "Hebridean isle" , "C. S. ---, --- Carroll, authors" , "Scots isle" , "Other half of Harris (Hebrides)" , "our 1/4 Across [GOLD MEDALLIST] in 2000" .)