Less cooked, flipped over rump prodded by skewer, finally (5)
I believe the answer is:
rarer
'less cooked' is the definition.
(I've seen this in another clue)
'flipped over rump prodded by skewer finally' is the wordplay.
'flipped over' says the letters should be written in reverse.
'rump' becomes 'rear' (synonyms).
'prodded by' indicates putting letters inside (inserted letters prod their way into others).
'skewer finally' becomes 'r' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'rear' placed around 'r' is 'rerar'.
'rerar' in reverse letter order is 'RARER'.
(Other definitions for rarer that I've seen before include "Stranger" , "less easy to find" , "(Of meat) less cooked" , "even less common" , "Less often seen" .)