Nelly getting excited when cuddling fit Welsh lad (9)
I believe the answer is:
llewellyn
'excited when cuddling fit welsh lad' is the definition.
I don't know anything about this answer so I can't tell whether this works.
'nelly' is the wordplay.
I cannot really understand how this works, but
an anagram of 'nelly' is 'ellyn' which is within the answer.
This may be the basis of the clue (or it may be nonsense).
'getting' acts as a link.
Can you help me to learn more?
(Another definition for llewellyn that I've seen is " Welshman".)