Supply teas now, and a piece of cake! (2,5)
I believe the answer is:
no sweat
'a piece of cake' is the definition.
(I've seen this before)
'supply teas now' is the wordplay.
'supply' is an anagram indicator (in a supple way).
'teas'+'now'='teasnow'
'teasnow' is an anagram of 'NO SWEAT'.
'and' is the link.
(Other definitions for no sweat that I've seen before include "Not a problem! (informal)" , "Don't worry" , "That won't be a problem" , "OK" , "There shouldn't be any objection" .)