Heads of department imply geography seminar is boring (4)
I believe the answer is:
digs
'boring' is the definition.
Although both the answer and definition are singular nouns, I can't see how one could define the other.
'heads of department imply geography seminar' is the wordplay.
'heads of' says to take the initial letters.
The first letters of 'department imply geography seminar' is 'DIGS'.
'is' is the link.
Can you help me to learn more?
(Other definitions for digs that I've seen before include "Lodgings - snide remarks" , "Delves" , "Is very keen on" , "archaeological operations" , "Enjoys" .)