Tedious jobs completed at last, OK with New York's redevelopment (6,4)
I believe the answer is:
donkey work
'tedious jobs' is the definition.
(term for boring jobs)
'completed at last ok with new york's redevelopment' is the wordplay.
'at last' suggests the final letters.
'with' is an insertion indicator.
'redevelopment' indicates an anagram.
The final letter of 'completed' is 'd'.
'new'+'york'='newyork'
'newyork' is an anagram of 'nkeywor'.
'ok' enclosing 'nkeywor' is 'onkeywork'.
'd'+'onkeywork'='DONKEY-WORK'
(Other definitions for donkey work that I've seen before include "A lot of effort" , "Grind" , "chore" , "Providing rides" , "Stevenson's travelling companion?" .)