Broach the subject again as I wander in (5)
I believe the answer is:
'broach the subject' is the definition.
'raise' can be an answer for 'broach' (I've seen this in another clue). I'm unsure of the 'the subject' bit.
'again as i wander in' is the wordplay.
'again' becomes 're'.
'wander' is an anagram indicator.
'in' indicates putting letters inside.
'asi' anagrammed gives 'ais'.
're' enclosing 'ais' is 'RAISE'.
Can you help me to learn more?
(Other definitions for raise that I've seen before include "Amplify" , "Cultivate by growing" , "Aries (anag)" , "More money from America" , "Contact" .)