Street trader’s period plugging a type of eel containing bone (12)
I believe the answer is:
costermonger
'street trader's period plugging a type of eel containing bone' is the definition.
I can't tell whether this defines the answer.
'period plugging a type of eel containing bone' is the wordplay.
'period' becomes 'term' (term is a kind of period).
'plugging' indicates putting letters inside (inserted letters plug up a gap in the word).
'a type of eel' becomes 'conger' ().
'containing' indicates putting letters inside.
'bone' becomes 'os' (Latin for 'bone').
'term' inserted inside 'conger' is 'ctermonger'.
'ctermonger' enclosing 'os' is 'COSTERMONGER'.
Can you help me to learn more?
(Other definitions for costermonger that I've seen before include "Fruit and veg seller" , "Old hawker of fruit and veg - corners got me (anag)" , "Barrow boy" , "Fruit/veg seller" .)