Crossword Help Forum
Forum Rules

18d Mounted soldiers arrived and left by railway (7)
I have: C???L?Y. If it is cavalry, please explain.
4d Impish child going to playground to use frame again? (7)
I have: R?C?I?B. I can only think of RECLIMB but am not sure.
Finally, 23a Let loose, in clear, though subject to demand (6-3)
I have: ??R?E-----------L?D

18D: CAME L RY

4D: Reclimb sounds ok.
'Rec' is a playground
a 'limb' is an impish child

4 Yes - Reclimb

Playground - REC (Recreation Ground)
Impish child - LIMB (yes really,it is in Chambers)

4. Reclimb is correct, rec + limb = an impish child
23. Market led, anagram of "let" in marked = clear

Thank you elle and mamya

Glad to help