Maybe Martin Luther King in favour of cracking Times cryptic (9)
I believe the answer is:
reformist
'maybe martin luther' is the definition.
I can't tell whether this definition defines the answer.
'king in favour of cracking times cryptic' is the wordplay.
'king' becomes 'R' (abbreviation of Latin rex).
'in favour of' becomes 'for' (being for a particular cause).
'cracking' means one lot of letters goes inside another (inserted letters go into a gap or crack).
'cryptic' is an anagram indicator (a cryptic or obscure order of the letters).
'times' with letters rearranged gives 'emist'.
'for' inserted within 'emist' is 'eformist'.
'r'+'eformist'='REFORMIST'
Can you help me to learn more?
(Other definitions for reformist that I've seen before include "Wanting to change" , "Religious campaigner" .)