Crossword Genius

Like section of army team, linger appallingly (10)

Ross

I believe the answer is:

regimental

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'like section of army' is the definition.
I can't tell whether this definition defines the answer.

'team linger appallingly' is the wordplay.
'appallingly' is an anagram indicator (I've seen this in other clues).
'team'+'linger'='teamlinger'
'teamlinger' is an anagram of 'REGIMENTAL'.

Can you help me to learn more?

(Another definition for regimental that I've seen is " Of a large army unit".)

I've seen this clue in The Times.
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