This month worker's on tick (7)
I believe the answer is:
instant
'tick' is the definition.
(I've seen this before)
'this month worker's on' is the wordplay.
'this month' becomes 'inst' (I've seen this before**).
'worker' becomes 'ant' (worker is a type of ant).
'on' says to put letters next to each other.
'inst'+'ant'='INSTANT'
(Other definitions for instant that I've seen before include "like some coffee?" , "Mo" , "This coffee is made from powder" , "Brief moment" , "type of coffee" .)