Tradesman bursts into tears (9)
I believe the answer is:
stationer
'tradesman' is the definition.
(I've seen this before)
'bursts into tears' is the wordplay.
'bursts' indicates an anagram.
'into'+'tears'='intotears'
'intotears' is an anagram of 'STATIONER'.
(Other definitions for stationer that I've seen before include "Writing-materials shop" , "bookseller" , "I supply rulers: for example" , "Retailer of writing materials etc" , "has what writer needs" .)