Signal put aside, reportedly? (4)
I believe the answer is:
wave
'signal' is the definition.
(I've seen this before)
'put aside reportedly?' is the wordplay.
'put aside' becomes 'waive' (I've seen this in another clue).
'reportedly?' indicates a 'sounds like' (homophone) clue (I've seen 'reportedly' mean this).
'waive' sounds like 'WAVE'.
(Other definitions for wave that I've seen before include "Drive forward" , "Hand gesture -- hair feature" , "Undulate" , "Billow" , "Roller - breaker" .)