Collins, for one, is funnier after OED's tip (7)
I believe the answer is:
drummer
'collins for one' is the definition.
(Phil Collins is an example)
'funnier after oed's tip' is the wordplay.
'funnier' becomes 'rummer' ('rum' can be a synonym of 'funny').
'after' means one lot of letters go next to another.
'tip' suggests the final letters.
The final letter of 'oed' is 'd'.
'rummer' put after 'd' is 'DRUMMER'.
'is' is the link.
(Other definitions for drummer that I've seen before include "One beating" , "One using sticks" , "Musician" , "dozen Christmas presents" , "Someone who keeps 18 [RHYTHM]" .)