One handling money in his care roughly (7)
I believe the answer is:
cashier
'one handling money' is the definition.
(someone responsible for payments)
'his care roughly' is the wordplay.
'roughly' indicates an anagram.
'his'+'care'='hiscare'
'hiscare' is an anagram of 'CASHIER'.
'in' is the link.
(Other definitions for cashier that I've seen before include "One working till" , "Drum out of the army" , "employee accepting money" , "take out of service" , "One handles the money" .)