Collection of people climb, carrying rope to start with (5)
I believe the answer is:
group
'collection of people' is the definition.
'group' can be an answer for 'collection' (I've seen this before). I'm not sure about the 'of people' bit.
'climb carrying rope to start with' is the wordplay.
'climb' becomes 'goup' (to go up is to climb or rise).
'carrying' means one lot of letters goes inside another.
'to start with' indicates taking the first letters.
The initial letter of 'rope' is 'r'.
'goup' enclosing 'r' is 'GROUP'.
Can you help me to learn more?
(Other definitions for group that I've seen before include "Collection" , "Band (of musicians)" , "Band, bunch" , "Band, assembly" , "Number taken together" .)