Make a call to leader of group? (4)
I believe the answer is:
ring
'make a call' is the definition.
(thesaurus)
'to leader of group?' is the wordplay.
'to' becomes 'rin' (I am not sure about this - if you are sure you should believe this answer much more).
'leader of' indicates taking the first letters.
The initial letter of 'group' is 'g'.
'rin'+'g'='RING'
Can you help me to learn more?
(Other definitions for ring that I've seen before include "Phone; circular band" , "Circus space; surround" , "Chime" , "'It's a square, strangely, for boxers (4)'" , "Circular, band of metal say" .)