Terribly tired, did one’s best (5)
I believe the answer is:
tried
'did one's best' is the definition.
The answer and definition can be both to do with social activities as well as being past participle verbs.
Maybe they are linked in a way I don't understand?
'terribly tired' is the wordplay.
'terribly' is an anagram indicator.
'tired' with letters rearranged gives 'TRIED'.
Can you help me to learn more?
(Other definitions for tried that I've seen before include "Had a crack" , "Endeavoured" , "Made an effort" , "Made an attempt" , "Essayed" .)