Nurse with rig cut large extremity off a climber! (7)
I believe the answer is:
tendril
'climber' is the definition.
(I've seen this before)
'nurse with rig cut large' is the wordplay.
'nurse' becomes 'tend' (tend can mean to nurse or look after).
'with' is a charade indicator (letters next to each other).
'cut' means to remove the last letter.
'large' becomes 'L' (eg in clothes sizes).
'rig' with its last letter removed is 'ri'.
'tend'+'ri'+'l'='TENDRIL'
'extremity off a' is the link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for tendril that I've seen before include "Plant extrusion" , "Threadlike extension of a plant" , "Plant's curling support" , "Thread-like part by which climbing plant clings" , "Twining shoot" .)