An endless task for a TV presenter? (6)
I believe the answer is:
anchor
'tv presenter?' is the definition.
(I've seen this before)
'an endless task for a' is the wordplay.
'an endless' means to remove the last letter.
'task' becomes 'chore' ('chore' can be a synonym of 'task').
'for' means one lot of letters go next to another (I've seen this in other clues).
'a' becomes 'an'.
'chore' with its final letter taken off is 'chor'.
'chor' put after 'an' is 'ANCHOR'.
(Other definitions for anchor that I've seen before include "Secure (something) firmly in position" , "I present" , "Ship's fluke" , "Something (or someone) providing stability" , "ground" .)