Tips for sentence with unchanged opening word? (6)
I believe the answer is:
sesame
'opening word?' is the definition.
(I've seen this in another clue)
'tips for sentence with unchanged' is the wordplay.
'tips for' suggests removing the centre (only the tips of the word remain).
'with' is a charade indicator (letters next to each other).
'unchanged' becomes 'same' (similar in meaning).
'sentence' with its centre taken out is 'se'.
'se'+'same'='SESAME'
(Other definitions for sesame that I've seen before include "Plant grown for its seeds" , "Opening word for the oilplant?" , "Small oval seeds yielding an edible oil" , "'Open - - !' (Ali Baba)" , "Open ...... is magic phrase for opening door in pantomime" .)