Worked hard, stone split (7)
I believe the answer is:
striven
'worked hard' 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?
'stone split' is the wordplay.
'stone' becomes 'st' (abbreviation).
'split' becomes 'riven' (I've seen this in another clue).
'st'+'riven'='STRIVEN'
Can you help me to learn more?
(Other definitions for striven that I've seen before include "Endeavoured" , "(Has) made great efforts" , "Fought" , "Battled" , "sought" .)