Trample around like a crusading knight! (7)
I believe the answer is:
templar
'crusading knight' is the definition.
'templar' can be an answer for 'crusading' (I've seen this before). I'm not certain of the 'knight' bit.
'trample around' is the wordplay.
'around' indicates anagramming the letters.
'trample' is an anagram of 'TEMPLAR'.
'like a' is the link.
Can you help me to learn more?
(Other definitions for templar that I've seen before include "Member of religious and military order" , "Knight of a religious and military order" , "Crusading" , "Simon - (The Saint)" , "Old Crusader Knight" .)