Think it's spirit I ordered neat (8)
I believe the answer is:
ruminate
'think' is the definition.
(ruminating is a kind of thinking)
'spirit i ordered neat' is the wordplay.
'spirit' becomes 'rum' (I've seen this before).
'ordered' is an anagram indicator.
'neat' anagrammed gives 'nate'.
'rum'+'i'+'nate'='RUMINATE'
'it's' is the link.
(Other definitions for ruminate that I've seen before include "Seriously consider" , "Chew - ponder" , "Contemplate" , "Muse" , "Ponder or meditate in mature way" .)