Trendy town leader is cheeky writing to one of those breaking into the business (8)
I believe the answer is:
intruder
'to one of those breaking into the business' is the definition.
I can't tell whether this definition defines the answer.
'trendy town leader is cheeky' is the wordplay.
'trendy' becomes 'in'.
'leader' says to take the initial letters.
'is cheeky' becomes 'ruder' (I can't explain this - if you can you should believe this answer much more).
The initial letter of 'town' is 't'.
'in'+'t'+'ruder'='INTRUDER'
'writing' acts as a link.
Can you help me to learn more?
(Other definitions for intruder that I've seen before include "Person who enters uninvited, perhaps a burglar" , "Burglar, or one who barges in" , "Uninvited and unwelcome visitor" , "Unwelcome sort" , "Uninvited guest" .)