Matured, perhaps seeing force reduced (8)
I believe the answer is:
flowered
'matured perhaps' is the definition.
The definition and answer can be both related to change as well as being past participle verbs.
Perhaps you can see an association between them that I can't see?
'force reduced' is the wordplay.
'force' becomes 'f' (scientific abbreviation).
'reduced' becomes 'lowered' (I've seen this in another clue).
'f'+'lowered'='FLOWERED'
'seeing' acts as a link.
Can you help me to learn more?
(Other definitions for flowered that I've seen before include "Blossomed" , "opened out" , "Bloomed" , "Reached a peak" , "Put forth blossom" .)