Very keen to join gunners' circle (6)
I believe the answer is:
raring
'very keen' is the definition.
'raring' can be an answer for 'keen' (I've seen this before). I'm unsure of the 'very' bit.
'join gunners' circle' is the wordplay.
'join' is a charade indicator (letters next to each other).
'gunners'' becomes 'ra' (Royal Artillery).
'circle' becomes 'ring' (synonyms).
'ra' put next to 'ring' is 'RARING'.
'to' acts as a link.
Can you help me to learn more?
(Other definitions for raring that I've seen before include "Very eager (to do something)" , "Eager (to go?)" , "Agog" , "Eager, impatient" , "Very keen (to go?)" .)