Initially went into garden with a massive tent (6)
I believe the answer is:
wigwam
'tent' is the definition.
(I've seen this before)
'initially went into garden with a massive' is the wordplay.
'initially' says to take the initial letters.
'massive' becomes 'm' (this could be a standard abbreviation which I don't know about).
The first letters of 'went into garden with' is 'wigw'.
'wigw'+'a'+'m'='WIGWAM'
Can you help me to learn more?
(Other definitions for wigwam that I've seen before include "Teepee" , "Native American accommodation" , "Tent-hut once used by native Americans" , "Tent formerly used by American Indians" , "Tent of framework and skins used by native Americans" .)