In one part of England, it's a 'plus' (3)
I believe the answer is:
and
'a plus' is the definition.
(I've seen this in another clue)
'in one part of england' is the wordplay.
'AND' is hidden within the letters.
But, I'm not sure how this is indicated.
'it's' is the link.
Can you help me to learn more?
(Other definitions for and that I've seen before include "moreover" , "it needs wholly positive input for positive result" , "Together with" , "A very common conjunction" , "Joiner or dandies" .)