Choice tips from expert getting post (6)
I believe the answer is:
picket
'post' is the definition.
(thesaurus)
'choice tips from expert getting' is the wordplay.
'choice' becomes 'pick' (synonyms).
'tips from' says to hollow out the word (remove centre letters).
'getting' means one lot of letters go next to another.
'expert' with its middle taken out is 'et'.
'pick'+'et'='PICKET'
(Other definitions for picket that I've seen before include "Fence post; protest group" , "attempt to extend strike" , "Kind of fence or striking workers" , "Group of striking workers outside workplace" , "Small patrol" .)