In Hay, Lieutenant Ling moved in hesitant manner (9)
I believe the answer is:
haltingly
'in hay lieutenant ling moved in hesitant manner' is the definition.
I can't judge whether this defines the answer.
'in hay lieutenant ling moved in' is the wordplay.
'in' is an insertion indicator.
'lieutenant' becomes 'lt' (abbreviation for lieutenant).
'moved' indicates anagramming the letters.
'in' is an insertion indicator.
'hay' enclosing 'lt' is 'halty'.
'ling' is an anagram of 'ingl'.
'halty' enclosing 'ingl' is 'HALTINGLY'.
Can you help me to learn more?
(Another definition for haltingly that I've seen is " with hesitation".)