Boris's tips for the across solutions here (5)
I believe the answer is:
bands
'solutions here' is the definition.
Although both the answer and 'here' are nouns, they are not in the same form of the noun.
'boris's tips for the across' is the wordplay.
'tips' says to take the initial letters (tip can refer to the top end of something).
'for' says to put letters next to each other.
'the across' becomes 'ands' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
The first letter of 'boris' is 'b'.
'b'+'ands'='BANDS'
Can you help me to learn more?
(Other definitions for bands that I've seen before include "Pop groups" , "Gangs" , "Groups playing popular music" , "Musical groups" .)