Crossword Genius

Chief initially recklessly (9)

Ross

I believe the answer is:

headfirst

'recklessly' is the definition.
(thesaurus)

'chief initially' is the wordplay.
'chief' becomes 'head' (synonyms).
'initially' becomes 'first' (I've seen this in another clue).
'head'+'first'='HEADFIRST'

(Other definitions for headfirst that I've seen before include "rashly" , "If trashed, dive as divers usually do" , "Without thinking" , "Impetuously" .)

I've seen this clue in The Mirror.
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