Military hero leads to lively celebrations in festival (2,3)
I believe the answer is:
el cid
'military hero' is the definition.
'el cid' can be an answer for 'hero' (I've seen this before). I'm not certain of the 'military' bit.
'leads to lively celebrations in festival' is the wordplay.
'leads to' indicates taking the first letters.
'in' means one lot of letters goes inside another.
'festival' becomes 'eid' (Muslim festival).
The first letters of 'lively celebrations' is 'lc'.
'lc' put into 'eid' is 'EL CID'.
Can you help me to learn more?
(Other definitions for el cid that I've seen before include "epic movie" , "11th century Spanish hero" , "Rodrigo Diaz de Vivar was his original name" , "C11 Spanish warrior hero" , "Role of Charlton" .)