Endlessly protect worker with midweek assurance (9)
I believe the answer is:
guarantee
'assurance' is the definition.
(I know that guarantee is a type of assurance)
'endlessly protect worker with midweek' is the wordplay.
'endlessly' means to remove the last letter.
'protect' becomes 'guard' (guarding is a kind of protecting).
'worker' becomes 'ant' (worker is a type of ant).
'with midweek' becomes 'ee' (I am not sure about the 'with' bit.).
'guard' with its final letter removed is 'guar'.
'guar'+'ant'+'ee'='GUARANTEE'
Can you help me to learn more?
(Other definitions for guarantee that I've seen before include "Warranty, pledge" , "Formal promise of action" , "Ensure" , "Underwrite; promise with certainty" , "Promising" .)