Northerner whose daughter replaces traveller's first son (8)
I believe the answer is:
dalesman
'northerner' is the definition.
(I've seen this before)
'daughter replaces traveller's first son' is the wordplay.
I cannot really understand how this works, but
'daughter' could be 'd' (genealogical abbreviation) and 'd' is found in the answer.
'first' could be 'a' (first letter of the alphabet) and 'a' is present in the answer.
'son' could be 's' (genealogical abbreviation for son) and 's' is found in the answer.
The remaining letters 'leman' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
'whose' acts as a link.
Can you help me to learn more?
(Other definitions for dalesman that I've seen before include "native of Yorkshire" , "Northerner" , "who may live in Yorkshire?" , "one from Yorkshire" .)