no-nonsense
adjective /ˌnəʊ ˈnɒnsns/
  /ˌnəʊ ˈnɑːnsens/,  /ˌnəʊ ˈnɑːnsns/
[only before noun]- simple and direct; only paying attention to important and necessary things
- a no-nonsense approach/style
 - She was a tough, no-nonsense leader.
 
Oxford Collocations DictionaryNo-nonsense is used with these nouns:- approach
 - manner