On-the-job training in oddly nice pit, perhaps (14)
I believe the answer is:
apprenticeship
'on-the-job training' is the definition.
(thesaurus)
'oddly nice pit perhaps' is the wordplay.
'oddly' is an anagram indicator.
'nice'+'pit'+'perhaps'='nicepitperhaps'
'nicepitperhaps' is an anagram of 'APPRENTICESHIP'.
'in' acts as a link.
(Other definitions for apprenticeship that I've seen before include "Period for learning a skilled trade" , "articles" , "Training" .)