Those ground-breaking types of accommodation with key in ship (6)
I believe the answer is:
spades
'those ground-breaking types' is the definition.
I can't judge whether this defines the answer.
'accommodation with key in ship' is the wordplay.
'accommodation with' becomes 'pad' (I can't explain this - if you can you should believe this answer much more).
'key' becomes 'e' (I've seen this in other clues).
'in' means one lot of letters goes inside another.
'ship' becomes 'ss'.
'pad'+'e'='pade'
'pade' placed into 'ss' is 'SPADES'.
'of' acts as a link.
Can you help me to learn more?
(Other definitions for spades that I've seen before include "Implements for a suit" , "Digging tools and card suit" , "Does some groundwork" , "Passed around with diggers" , "Digging implements" .)