Considered source of inspiration on the day (5)
I believe the answer is:
mused
'considered source' is the definition.
The answer and definition can be both related to thinking as well as being past participle verbs.
Maybe there's a link between them I don't understand?
'inspiration on the day' is the wordplay.
'inspiration' becomes 'muse' (a muse is someone's inspiration).
'on' says to put letters next to each other (in a down clue, letters appear on others).
'the day' becomes 'd' (abbreviation for day).
'muse'+'d'='MUSED'
'of' acts as a link.
Can you help me to learn more?
(Other definitions for mused that I've seen before include "Fuddled" , "'Meditated, mulled (5)'" , "Contemplated" , "Was deep in thought" , "Closer" .)