While ruler is supportive, it's looking to find trouble (6,3,2)
I believe the answer is:
asking for it
'trouble' is the definition.
(I have seen 'Tempting trouble' mean 'asking for it' so perhaps 'trouble' could also mean 'asking for it')
'while ruler is supportive it's looking' is the wordplay.
I cannot quite see how this works, but
'while' could be 'as' (eg 'while I walked' means 'as I walked') and 'as' is present in the answer.
'ruler' could be 'king' (king is a kind of ruler) and 'king' is located in the answer.
'supportive' could be 'for' (I've seen this in another clue) and 'for' is present in the answer.
'it' could be 't' (abbreviation. e.g. in 'tis) and 't' is found in the answer.
A single letter 'i' remains which might be clued in a way I don't see.
This explanation may well be incorrect...
'to find' acts as a link.
Can you help me to learn more?
(Another definition for asking for it that I've seen is " Tempting trouble".)