A small number attempt to get round a lawyer (6)
I believe the answer is:
notary
'lawyer' is the definition.
'a small number attempt to get round a' is the wordplay.
'a small number' becomes 'no' (abbreviation for 'number'; 'small' indicates a short form).
'attempt' becomes 'try' (synonyms).
'to get round' means one lot of letters goes inside another.
'try' placed around 'a' is 'tary'.
'no'+'tary'='NOTARY'
(Other definitions for notary that I've seen before include "Public official, usually a solicitor" , "Official authorised to witness signing of documents" , "Public records official" , "One drawing up legal documents" , "Legal officer" .)