Crossword Genius

Marshal aligns indicator (6)

Ross

I believe the answer is:

signal

I'm a little stuck... Click here to teach me more about this clue!

'indicator' is the definition.
(I've seen this before)

'marshal aligns' is the wordplay.
'aligns' can be anagrammed to 'SIGNAL'.
However, I'm not clear how this is indicated.

Can you help me to learn more?

(Other definitions for signal that I've seen before include "Non-verbal action with an encoded message" , "Communication that encodes a message" , "Outstanding - information sent over a distance" , "Indication or warning" , "Sign that conveys a message" .)

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