Dic: let somebody get on with it

• She wanted to decorate her room, so I just let her get on with it.
• The trading manager's genius and his weakness was that he believed in hiring the best people and letting them get on with it, as long as he is kept informed. (modulated from another source)

[informal] to let someone do something on their own, and not help them or tell them what to do.

..... LDOCE, http://www.ldoceonline.com/dictionary/get

***

cf 1: get on with it! [spoken] used to tell someone to hurry:

• Will you lot stop messing around and get on with it!

cf 2: like somebody

• I've always got on well with Henry.
• The two boys get on well most of the time.

cf 3: progress

• How is George getting on at school?
• How are you getting on with your essay?
• I don't know how we'll get on without Michael.

cf 4: continue doing something

• Be quiet and get on with your work!

cf 5: be successful

• You'll have to work hard if you want to get on.

.... All the sources are the same as the first