Press appreciated pollie (4)
I believe the answer is:
tamp
'press' is the definition.
(thesaurus)
'appreciated pollie' is the wordplay.
'appreciated' becomes 'ta' (I've seen this in other clues).
'pollie' becomes 'mp' (I can't justify this - if you can you should believe this answer much more).
'ta'+'mp'='TAMP'
Can you help me to learn more?
(Other definitions for tamp that I've seen before include "Pack down eg tobacco in a pipe" , "Push down tobacco" , "Pack (eg earth) down firmly" , "Press down tightly" , "Pack, force down" .)