He's with it: soldier holding back? (8)

I believe the answer is:

hesitant

'holding back?' is the definition.
(to hold back is to hesitate)

'he's with it soldier' is the wordplay.
'with' is a charade indicator (letters next to each other).
'soldier' becomes 'ant' (soldier is a type of ant).
'hes'+'it'+'ant'='HESITANT'

(Other definitions for hesitant that I've seen before include "Lacking decisiveness" , "Irresolute" , "Expressing doubts" , "Demurring" , "The Saint? (anag)" .)

I've seen this clue in The Sun.

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