Put your foot down! (5)
But I've got no explanation for this one! Could you help me understand?
(Other definitions for stamp that I've seen before include "Postal token" , "squash?" , "contributions?" , "Impress; postage sticker" , "What to put on 7 before putting in 15" .)
'foot down' is the definition.
'tread' can be an answer for 'foot' (treading is a kind of footing). I'm not certain of the 'down' bit.
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for tread that I've seen before include "Press (grapes by foot)" , "Tyre moulding" , "A measurement of tyre" , "Tramp" , "Walk or step like pattern on tyre" .)
(Other definitions for accelerate that I've seen before include "snowball" , "Quicken" , "Increase speed" , "Go faster" , "Crank up" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">put your foot down?</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for step that I've seen before include "Place foot on as with a pest" , "Single pace" , "Foot movement" , "Tread - stage" , "Footprint" .)