Standard and Sun cover training records (6)
I believe the answer is:
papers
'records' is the definition.
(papers can mean records or documents)
'standard and sun cover training' is the wordplay.
'standard' becomes 'par' (standard of play in golf).
'and' is a charade indicator (letters next to each other).
'sun' becomes 'S' (abbreviation).
'cover' is an insertion indicator.
'training' becomes 'PE' (Physical Education).
'par'+'s'='pars'
'pars' enclosing 'pe' is 'PAPERS'.
(Other definitions for papers that I've seen before include "Identifying documents" , "ID etc." , "Documentation" , "Print media" , "Documents; the press" .)