Crossword Genius

Wally taking spool from loom, then second spool (5)

Ross

I believe the answer is:

twerp

I'm a little stuck... Click here to teach me more about this clue!

'second spool' is the definition.
The answer and definition can be both people as well as being singular nouns.
Perhaps they are linked in a way I don't understand?

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for twerp that I've seen before include "dope" , "Foolish fellow" , "Pillock" , "Idiot" , "Contemptible type" .)

I've seen this clue in the Sydney Morning Herald.
Want a hint initially instead of a full solution? Install my app