English rush north for work (5)
I believe the answer is:
trade
'english rush north for work' is the definition.
'trade' can be an answer for 'work' (thesaurus). I'm not sure about the 'english rush north for' bit.
'rush north for work' is the wordplay.
'rush' becomes 'dart' (darting is a kind of rushing).
'north' is a reversal indicator (in a down clue, letters go up or 'northward').
'for work' becomes 'e' (I can't justify this - if you can you should give a lot more credence to this answer).
'dart' backwards is 'trad'.
'trad'+'e'='TRADE'
Can you help me to learn more?
(Other definitions for trade that I've seen before include "A skilled craft to earn living" , "Commercial exchange of goods and services" , "Buying/selling of goods" , "Barter or swap" , "Commercial dealings" .)