Lancashire lass returns with seeds, oddly, for badgers (8)
I believe the answer is:
harasses
'badgers' is the definition.
('harass' can be a synonym of 'badger')
'lancashire lass returns with seeds oddly' is the wordplay.
'lancashire lass' becomes 'sarah' (I can't explain this - if you can you should believe this answer much more).
'returns' shows that the letters should be reversed in order.
'with' is a charade indicator (letters next to each other).
'oddly' indicates alternate letters (letters in the odd-numbered positions are used).
The alternating letters of 'seeds' are 'ses'.
'sarah' written backwards gives 'haras'.
'haras'+'ses'='HARASSES'
'for' acts as a link.
Can you help me to learn more?
(Other definitions for harasses that I've seen before include "Badgers" , "Pesters and annoys" , "Annoys continually, as rashes may" .)